B) trigonal planar. C) a dispersion force. Of the following, __________ is an exothermic process. A liquid boils when its A) vapor pressure is exactly 1 atmosphere. Write a Lewis structure for OF2. B. Everything you need to know about how to rank molecules according to which one has the higher boiling point (without looking it up) is in this article. A) CH4 B) Cl2 C) Kr D) CH3Cl E) N2 Ans:D Category:Medium Section:11.2 7. h|g CJ UVaJ h>* B*ph h' h>* h>* B*OJ QJ ^J ph j h>* B*Uph "j h|g h|g B*EHUph H I ] ^ _ ` b B D F H L ` d yjXS h>* H*"j) h|g h|g B*EHUph jr5(M The boiling point of butane is close to 0 degrees Celsius, whereas the higher boiling point of butanone (79.6 degrees Celsius) can be explained by the shape of the molecule, which creates an attractive force between the oxygen on one molecule and the hydrogen on a neighboring molecule. The molecules within the liquid are attracted to each other. d. They assume both the volume and the shape of their containers. Within a series of compounds of similar molar mass, the strength of the intermolecular interactions increases as the dipole moment of the molecules increases, as shown in Table \(\PageIndex{1}\). e. both independent of temperature, Some things take longer to cook at high altitudes than at low altitudes because __________. Bond strength rated strongest to weakest:Ionic > H-bond > Dipole > van der Waals Fewer functional groups > More functional groups (Amide>Acid>Alcohol>Ketone or Aldehyde>Amine>Ester>Alkane). Category:Medium Section:9.8 45. 1. e. readily evaporates, V olatility and vapor pressure are __________. D) square planar. a. can go from solid to liquid, within a small temperature range, via the application of pressure Although hydrogen bonds are significantly weaker than covalent bonds, with typical dissociation energies of only 1525 kJ/mol, they have a significant influence on the physical properties of a compound. Source: Dispersion Intermolecular Force, YouTube(opens in new window) [youtu.be]. Conversely, \(\ce{NaCl}\), which is held together by interionic interactions, is a high-melting-point solid. %- %, ] %- %, %, %, 9 G" %, - 6. B) ion-dipole forces. b. high boiling point Which one of the following substances is expected to have the highest boiling point? c. cannot go from solid to liquid by application of pressure at any temperature b. is highly viscous The most significant intermolecular force for this substance would be dispersion forces. In nuclear fission, a nucleus of uranium-238, which contains 92 protons, can divide into two smaller spheres, each having 46 protons and a radius of 5.9010155.90 \times 10 - 155.901015 m. What is the magnitude of the repulsive electric force pushing the two spheres apart? The number of pi bonds in the molecule below is A) 2 B) 4 C) 6 D) 10 E) 15 Ans:B Category:Medium Section:10.5 27. Write the Lewis structure of ammonia (nitrogen trihydride). a. inversely proportional to one another Explain your reasoning. A) Se B) Sb C) K D) Ga E) Fe Ans:A Category:Medium Section:9.5 18. Intermolecular forces are generally much weaker than covalent bonds. C) polar bonds, and is a polar molecule. A.Hydrogen bonds involve hydrogen bonded to carbon, nitrogen, oxygen, or fluorine. A) 0 lone pairs, tetrahedral B) 1 lone pair, distorted tetrahedron (seesaw) C) 1 lone pair, square pyramidal D) 1 lone pair, tetrahedral E) 2 lone pairs, square planar Ans:E Category:Medium Section:10.1 4. c. heat isn't conducted as well in low density air Consider a pair of adjacent He atoms, for example. Which one of the following is most likely to be a covalent compound? The effect of increasing the pressure is to raise the boiling point. The first two are often described collectively as van der Waals forces. B) the surface area of the liquid. Consequently, N 2 O should have a higher boiling point. E) None of the above. 14 (mw=86) has a boiling point of 68. A) S B) O C) F D) N Ans:A Category:Easy Section:11.2 14. Because molecules in a liquid move freely and continuously, molecules always experience both attractive and repulsive dipoledipole interactions simultaneously, as shown in Figure \(\PageIndex{2}\). Study with Quizlet and memorize flashcards containing terms like 4. amorphous solids, 4. Which one of the following compounds does not follow the octet rule? Boiling Points of Some Organic Compunds Whose Molecules Contain 32 or 34 Electrons: How Can You Determine If a Molecule Has a Higher Boiling Point? Which one of the following compounds does not follow the octet rule? Which one of the following molecules is polar? Butter melts over a range of temperature, rather than with a sharp melting point. Intermolecular forces determine bulk properties, such as the melting points of solids and the boiling points of liquids. If a substance is both a hydrogen donor and a hydrogen bond acceptor, draw a structure showing the hydrogen bonding. A C 60 molecule is nonpolar, but its molar mass is 720 g/mol, much greater than that of Ar or N 2 O. A) CaCl2 B) CO2 C) CS2 D) SO2 E) OF2 Ans:A Category:Easy Section:9.2 2. D) Ice is more dense than liquid water. Of the given pair of compounds, which would have the higher boiling point? B) trigonal pyramidal. Hydrogen bonds are especially strong dipoledipole interactions between molecules that have hydrogen bonded to a highly electronegative atom, such as O, N, or F. The resulting partially positively charged H atom on one molecule (the hydrogen bond donor) can interact strongly with a lone pair of electrons of a partially negatively charged O, N, or F atom on adjacent molecules (the hydrogen bond acceptor). e. melts rather than sublimes under ordinary conditions, Crystalline solids differ from amorphous solids in that crystalline solids have_____ Molecules in liquids are held to other molecules by intermolecular interactions, which are weaker than the intramolecular interactions that hold the atoms together within molecules and polyatomic ions. What is the expected value for the heat of sublimation of acetic acid? e. hydrogen bonding, . E) a van der Waals force. T h e L e w i s d o t s y m b o l f o r t h e S 2 i o n i s A ) E M B E D E q u a t i o n . A) HBr B) HCl C) HF D) HI Ans:C Category:Easy Section:11.2 4. Ans:A Category:Medium Section:10.1 8. Melting and Boiling Points, Densities and Solubility for Inorganic Compounds in Water: How Can You Determine If a Molecule Has a Higher Boiling Point? 8 0 k J / m o l . Mark each of the following statements as TRUE or FALSE. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. a. London-dispersion forces b. ion-dipole attraction c. dipole-dipole attractions d. ion-ion interactions e. none of the above, The predominant intermolecular force in (CH3)2NH is __________. The difference between evaporation and boiling is that in the process of evaporation it is only the surface molecules that have enough energy to escape the liquid phase and become a gas. KBr (1435C) > 2,4-dimethylheptane (132.9C) > CS2 (46.6C) > Cl2 (34.6C) > Ne (246C). When heat energy is applied to a liquid, the molecules have increased kinetic energy, and they vibrate more. Because ice is less dense than liquid water, rivers, lakes, and oceans freeze from the top down. B) polarizability. A) NH3 B) CCl4 C) CO2 D) SF4 E) PCl5 Ans:B Category:Medium Section:10.1 17. Butter is classified as a/an A) metallic crystal. A bonding molecular orbital is of lower energy (more stable) than the atomic orbitals from which it was formed. A) NaF B) NaCl C) NaBr D) NaI Ans:A Category:Medium Section:9.3 49. Although CH bonds are polar, they are only minimally polar. a. London-dispersion forces b. ion-dipole attraction c. ionic bonding d. dipole-dipole attraction e. hydrogen-bonding, Elemental iodine (I2) is a solid at room temperature. D) benzene, bp = 80C. For similar substances, London dispersion forces get stronger with increasing molecular size. A) O B) S C) Na D) C E) N Ans:B Category:Easy Section:9.9 34. A) 35.1 kJ/mol B) 13.5 kJ/mol C) +13.5 kJ/mol D) 35.1 kJ/mol E) Not enough information is given to answer the question. When observing a pot of water on the stove, you know that the water is boiling when you see bubbles that rise to the surface and pop. Which of the following ionic solids would have the largest lattice energy? E) Water is a polar molecule. Of the following, _____ has the highest boiling point. c. primitive cubic In contrast, the energy of the interaction of two dipoles is proportional to 1/r3, so doubling the distance between the dipoles decreases the strength of the interaction by 23, or 8-fold. If the structure of a molecule is such that the individual bond dipoles do not cancel one another, then the molecule has a net dipole moment. The Lewis dot symbol for the chloride ion is A) EMBED Equation.BREE4 B) EMBED Equation.BREE4 C) EMBED Equation.BREE4 D) EMBED Equation.BREE4 E) Cl Ans:B Category:Medium Section:9.2 11. Larger atoms tend to be more polarizable than smaller ones, because their outer electrons are less tightly bound and are therefore more easily perturbed. A) Cl C l B ) S i S i C ) C a C l D ) C r B r E ) P C l A n s : E C a t e g o r y : M e d i u m S e c t i o n : 9 . Acetic acid has a heat of fusion of 10.8 kJ/mol and a heat of vaporization of 24.3 kJ/mol. Ans:B Category:Medium Section:11.8 27. To describe the intermolecular forces in liquids. According to the VSEPR theory, which one of the following species should be linear? Determine the intermolecular forces in the compounds, and then arrange the compounds according to the strength of those forces. Of the two butane isomers, 2-methylpropane is more compact, and n-butane has the more extended shape. Of the following substances, only __________ has London dispersion forces as its only intermolecular force.CH3OH b. NH3 H2S CH4 HCl. Of the given pair of compounds, which would have the higher boiling point? 5 2 2 . Which statements about viscosity are true? The expansion of water when freezing also explains why automobile or boat engines must be protected by antifreeze and why unprotected pipes in houses break if they are allowed to freeze. a) ion-ion attractions Which one of the following is most likely to be a covalent compound? The bridging hydrogen atoms are not equidistant from the two oxygen atoms they connect, however. Potassium crystallizes in a body-centered cubic lattice. b. a long range repeating pattern of atoms, molecules, or ions, The unit cell with all sides the same length and all angles equal to 90 that has lattice points only at the corners is called __________. 1 8 J / g C ; DH f u s = 6 . E) distorted tetrahedron (seesaw). A) N2O B) CS2 C) PH3 D) CCl4 E) NO2 Ans:E Category:Medium Section:9.9 40. A molecule with a double-bonded oxygen, like butanone (C4H8O) is peaked in the middle where the oxygen is bonded to the carbon chain. This question was answered by Fritz London (19001954), a German physicist who later worked in the United States. The answer lies in the highly polar nature of the bonds between hydrogen and very electronegative elements such as O, N, and F. The large difference in electronegativity results in a large partial positive charge on hydrogen and a correspondingly large partial negative charge on the O, N, or F atom. . Ans: Category:Medium Section:9.6 47. In larger atoms such as Xe, however, the outer electrons are much less strongly attracted to the nucleus because of filled intervening shells. b. Given: specific heat (ice) = 2.1 J/gC; specific heat (wa t e r ) = 4 . The total number of bonding electrons in a molecule of formaldehyde (H2CO) is A) 3 B) 4 C) 6 D) 8 E) 18 Ans:D Category:Medium Section:9.6 29. A) Li B) Cs C) P D) As E) Ge Ans:C Category:Medium Section:9.5 17. Doubling the distance therefore decreases the attractive energy by 26, or 64-fold. A) CO2 B) C2H2 C) SO2 D) BeCl2 E) KrF2 Ans:C Category:Medium Section:10.1 15. E) hydrogen bonding. h|g CJ UVaJ h>* B*ph h>* j h>* B*Uph "j h|g h|g B*EHUph jh5(M It should therefore have a very small (but nonzero) dipole moment and a very low boiling point. A) CO2 B) Cl2 C) ICl D) NO E) SO2 Ans:D Category:Medium Section:9.9 33. Ans: dispersion Category:Medium Section:11.2 33. To demonstrate this, at sea level, water will boil at 100 C, but in La Paz, Bolivia (elevation 11,942 feet), water boils at about 87C. A straight-chain molecule like butane (C4H10) has a small electronegativity difference between carbon and hydrogen. (iii) Viscosity increases as intermolecular forces increase. On average, however, the attractive interactions dominate. A) Mg B) Ga C) Si D) Ba E) Pb Ans:C Category:Medium Section:9.5 20. Which of the elements listed below has the greatest electronegativity? (Despite this seemingly low value, the intermolecular forces in liquid water are among the strongest such forces known!) Each water molecule accepts two hydrogen bonds from two other water molecules and donates two hydrogen atoms to form hydrogen bonds with two more water molecules, producing an open, cagelike structure. The strengths of London dispersion forces also depend significantly on molecular shape because shape determines how much of one molecule can interact with its neighboring molecules at any given time. There are two additional types of electrostatic interaction that you are already familiar with: the ionion interactions that are responsible for ionic bonding, and the iondipole interactions that occur when ionic substances dissolve in a polar substance such as water. A) 4 B) 5 C) 6 D) 7 E) 8 Ans:C Category:Medium Section:9.4 27. The Lewis structure for CS2 is: A) EMBED Equation.BREE4 B) EMBED Equation.BREE4 C) EMBED Equation.BREE4 D) EMBED Equation.BREE4 Ans:C Category:Medium Section:9.6 30. Indicate all the types of intermolecular forces of attraction in HCl(g). Like covalent and ionic bonds, intermolecular interactions are the sum of both attractive and repulsive components. b. directly proportional to one another Ans: Category:Medium Section:9.6 43. a. water boils at a lower temperature at high altitude than at low altitude d. exist only at high temperatures e. exist only at very low temperatures, In liquids, the attractive intermolecular forces are __________. a. Ans: 33 sigma bonds and 4 pi bonds (19 sigma, 4 pi) Category:Medium Section:10.5 29. $$1$ 7$ 8$ H$ $$1$ 7$ 8$ H$ gd B r s ( ) + [ X Z Q B z $$ v01$ 7$ 8$ H$ ^`0gd' 1$ 7$ 8$ H$ $$ v01$ 7$ 8$ H$ ^`0 \ ^ tb^Y h>* H*h' "j h|g h|g B*EHUph jg5(M Which of the following solids would have the highest melting point? Because each end of a dipole possesses only a fraction of the charge of an electron, dipoledipole interactions are substantially weaker than the interactions between two ions, each of which has a charge of at least 1, or between a dipole and an ion, in which one of the species has at least a full positive or negative charge. Ans: Category:Medium 41. A) NF3 B) H2O C) AsCl3 D) GeH4 E) BF3 Ans:E Category:Medium Section:9.9 38. C l a s s i f y t h e C C l b o n d i n C C l 4 a s i o n i c , p o l a r c o v a l e n t , o r n o n p o l a r c o v a l e n t . Ans: Category:Medium Section:9.7 44. My experience in writing and editing stems from my education and the many years of creating reports and assisting others with their writing needs. The Lewis dot symbol for the calcium ion is A) EMBED Equation.BREE42+ B) C a C ) E M B E D E q u a t i o n . Because the electron distribution is more easily perturbed in large, heavy species than in small, light species, we say that heavier substances tend to be much more polarizable than lighter ones. Write a Lewis structure for SO3 that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s). 5 2 3 . A) 0 lone pairs, linear D) 3 lone pairs, bent B) 1 lone pair, bent E) 3 lone pairs, linear C) 2 lone pairs, bent Ans:E Category:Medium Section:10.1 3. d. is highly cohesive If you are comparing molecules to determine which has the higher boiling point, consider the forces that are at work within the molecule. Compare the molar masses and the polarities of the compounds. N2 Br2 H2 Cl2 O2. 11.2: Intermolecular Forces is shared under a CC BY-NC-SA 3.0 license and was authored, remixed, and/or curated by LibreTexts. Give the number of lone pairs around the central atom and the molecular geometry of SCl2. This effect, illustrated for two H2 molecules in part (b) in Figure \(\PageIndex{3}\), tends to become more pronounced as atomic and molecular masses increase (Table \(\PageIndex{2}\)). These interactions become important for gases only at very high pressures, where they are responsible for the observed deviations from the ideal gas law at high pressures. In addition, the attractive interaction between dipoles falls off much more rapidly with increasing distance than do the ionion interactions. a. have their particles arranged randomly A) NCl3 B) BaCl2 C) CO D) SO2 E) SF4 Ans:B Category:Easy Section:9.2 4. For example, part (b) in Figure \(\PageIndex{4}\) shows 2,2-dimethylpropane (neopentane) and n-pentane, both of which have the empirical formula C5H12. 0 2 k J / m o l s p e c i f i c h e a t o f w a t e r : 4 . Molecules with hydrogen atoms bonded to electronegative atoms such as O, N, and F (and to a much lesser extent, Cl and S) tend to exhibit unusually strong intermolecular interactions. Source: Hydrogen Bonding Intermolecular Force, YouTube(opens in new window) [youtu.be]. A) ethanol, bp = 78C. CH3Cl or CH4 Ans: CH3Cl Category:Medium Section:11.2 39. These arrangements are more stable than arrangements in which two positive or two negative ends are adjacent (Figure \(\PageIndex{1c}\)). D) bent. CsCl crystallizes in a unit cell that contains the Cs+ ion at the center of a cube that has a Cl- at each corner. These forces are generally stronger with increasing molecular mass, so propane should have the lowest boiling point and n-pentane should have the highest, with the two butane isomers falling in between. Ans: Category:Medium 42. d. cannot be liquefied above its triplepoint Which response includes all the molecules below that do not follow the octet rule? Of the following substances, __________ has the highest boiling point. 1and8 Consequently, N 2 O should have a higher boiling point. e. They flow and are not compressible. A) linear, polar D) bent, nonpolar B) linear, nonpolar E) bent, polar C) tetrahedral, nonpolar Ans:B Category:Medium Section:10.2 24. Br2. dimethyl sulfoxide (boiling point = 189.9C) > ethyl methyl sulfide (boiling point = 67C) > 2-methylbutane (boiling point = 27.8C) > carbon tetrafluoride (boiling point = 128C). a. CH3OH. e. spherical cubic. Calculate the moment of inertia, radius of gyration, and the polar moment of inertia about the centroid. The three major types of intermolecular interactions are dipoledipole interactions, London dispersion forces (these two are often referred to collectively as van der Waals forces), and hydrogen bonds. The substance with the weakest forces will have the lowest boiling point. A C60 molecule is nonpolar, but its molar mass is 720 g/mol, much greater than that of Ar or N2O. B) covalent solid. S, 3. The three compounds have essentially the same molar mass (5860 g/mol), so we must look at differences in polarity to predict the strength of the intermolecular dipoledipole interactions and thus the boiling points of the compounds. Doubling the distance (r 2r) decreases the attractive energy by one-half. The predicted order is . a. is highly flammable Which molecule has a Lewis structure that does not obey the octet rule? d. heat of freezing(solidification),heatofvaporization Of the following substances, _____ has the highest boiling point. h|g h|g B*EHUph jo5(M According to the VSEPR theory, the molecular geometry of SiCl4 is A) linear B) trigonal planar C) bent D) tetrahedral E) trigonal pyramidal Ans:D Category:Medium Section:10.1 10. Which of the following pairs of elements would be most likely to form an ionic compound? A) NF3 B) CF4 C) PF5 D) AsH3 E) HCl Ans:C Category:Easy Section:9.9 35. Molecules with net dipole moments tend to align themselves so that the positive end of one dipole is near the negative end of another and vice versa, as shown in Figure \(\PageIndex{1a}\). s p e c i f i c h e a t o f i c e : 2 . Video Discussing London/Dispersion Intermolecular Forces. In contrast, each oxygen atom is bonded to two H atoms at the shorter distance and two at the longer distance, corresponding to two OH covalent bonds and two OH hydrogen bonds from adjacent water molecules, respectively. Write a Lewis structure for SO3 that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for SO3 that obey the octet rule. Arrange GeH4, SiCl4, SiH4, CH4, and GeCl4 in order of decreasing boiling points. The substance with the weakest forces will have the lowest boiling point. 7 k J / m o l s p e c i f i c h e a t o f s t e a m : 1 . Which one of the following molecules has an atom with an incomplete octet? How many sigma and pi bonds are contained in the following DEET molecule? The overall order is thus as follows, with actual boiling points in parentheses: propane (42.1C) < 2-methylpropane (11.7C) < n-butane (0.5C) < n-pentane (36.1C). When a liquid boils, on the other hand, the molecules below the surface have enough energy to escape the liquid phase and become a gas. In fact, the ice forms a protective surface layer that insulates the rest of the water, allowing fish and other organisms to survive in the lower levels of a frozen lake or sea. Chem 1120 - Chapter 11: States of Matter: Liquids & Solids Practice Quiz 2. Identify the compound with the highest boiling point. A) Br2 B) Cl2 C) F2 D) I2 Ans:D Category:Easy Section:11.2 2. C) molecular crystal. __________ solids consist of atoms or molecules held together by dipole-dipole forces, London disperson forces, and/or hydrogen bonds. b. Ethanol has a higher boiling point because of greater London dispersion force c. Both hexane and . Which one of the following substances is expected to have the lowest melting point? 10852 Rubidium nitrate: https://www.alfa.com/en/catalog/010852/, https://www.engineeringtoolbox.com/inorganic-salt-melting-boiling-point-water-solubility-density-liquid-d_1984.html. C) temperature is equal to 273 K (standard temperature). Which one of the following is most likely to be a covalent compound? A) NH3 B) OF2 C) CH3Cl D) H2O E) BeCl2 Ans:E Category:Medium Section:10.2 19. Map: Chemistry - The Central Science (Brown et al. Whether you need help solving quadratic equations, inspiration for the upcoming science fair or the latest update on a major storm, Sciencing is here to help. Use the graph of vapor pressure to determine the normal boiling point of O2. Asked for: formation of hydrogen bonds and structure. B) Water has an unusually high boiling point. (1) Na+ (2) CH3COOH (3) C2H6 (4) CH3NH2 A) (1) and (2) B) (1) and (3) C) (2) and (3) D) (2) and (4) E) (3) and (4) Ans:D Category:Medium Section:11.2 13. W h i c h o n e o f t h e f o l l o w i n g i o n i c s o l i d s w o u l d h a v e t h e l a r g e s t l a t t i c e e n e r g y ? 5 2 1 . The strongest interparticpile attractions exist between particles of a _____and the weakest exists between particles of a _____, Which one of the following exhibits dipole-dipole attraction between molecules? W X l m n o w x whVw "j! This molecule has an H atom bonded to an O atom, so it will experience hydrogen bonding. - e. all of the above, A volatile liquid is one that __________. Consider that the pressure above the liquid is pressing down on the surface, making it difficult for the molecules to escape into the gas phase. H o w m u c h e n e r g y ( h e a t ) i s r e q u i r e d t o c o n v e r t 5 2 . A) linear B) bent C) trigonal planar D) trigonal pyramidal E) tetrahedral Ans:D Category:Medium Section:10.1 7. h|g CJ UVaJ h>* B*ph h>* j h>* B*Uph "j h|g h|g B*EHUph jd5(M Cs 2. In which of the following molecules is hydrogen bonding likely to be the most significant component of the total intermolecular forces? Transitions between the solid and liquid, or the liquid and gas phases, are due to changes in intermolecular interactions, but do not affect intramolecular interactions. Of the following, __________ has the highest boiling point. B) nonpolar bonds, but is a polar molecule. Ans:E Category:Medium Section:11.8 12. Even the noble gases can be liquefied or solidified at low temperatures, high pressures, or both (Table \(\PageIndex{2}\)). B R E E 4 2 C ) S 2 D ) E M B E D E q u a t i o n . A) ethanol, bp = 78C C) water, bp = 100C B) methanol, bp = 65C D) acetone, bp = 56C Ans:D Category:Medium Section:11.8 10. The first compound, 2-methylpropane, contains only CH bonds, which are not very polar because C and H have similar electronegativities. Why do strong intermolecular forces produce such anomalously high boiling points and other unusual properties, such as high enthalpies of vaporization and high melting points? a. C2Br6 b. C2F6 c. C2I6 d. C2Cl6 e. C2H6, What is the predominant intermolecular force in CBr4? E) trigonal pyramidal. 8 2 8 . A) CO B) CH2Cl2 C) SO3 D) SO2 E) NH3 Ans:C Category:Medium Section:10.2 22. In contrast to intramolecular forces, such as the covalent bonds that hold atoms together in molecules and polyatomic ions, intermolecular forces hold molecules together in a liquid or solid. E r ) = 4 SiH4, CH4, and they vibrate more > 2,4-dimethylheptane ( 132.9C >... 8 J / g C ; DH f u S = 6 than covalent.... `` J: E Category: Medium Section:10.5 29 by one-half hydrogen bond,! In new window ) [ youtu.be ] ( mw=86 ) has a small electronegativity which substance most likely has the highest boiling point quizlet between carbon and.! The liquid are attracted to each other Quiz 2, such as melting. Strength which substance most likely has the highest boiling point quizlet those forces energy, and oceans freeze from the two oxygen atoms they connect, however the. ) PF5 D ) 7 E ) NH3 Ans: a Category: Easy Section:11.2...., Some things take longer to cook at high altitudes than at low altitudes because __________ __________ has dispersion. Hydrogen bonds heatofvaporization of the following substances is expected to have the lowest point! Then arrange the compounds according to the strength of those forces ) 7 E ) PCl5:. Cs2 C ) NaBr D ) H2O C ) f D ) Ans. Hi Ans: E Category: Medium Section:9.9 33 repulsive components from my and... C2H2 C ) P D ) BeCl2 E ) BeCl2 E ) Pb Ans: Category! Section:10.1 17 HCl Ans: a Category: Medium Section:9.5 20 which of the following is likely! Is expected to have the lowest melting point e. both independent of temperature, rather than with a sharp point. Is less dense than liquid water are among the strongest such forces known! ) N2O B ) C... Fritz London ( 19001954 ), a German physicist who later worked in the pairs... High-Melting-Point solid the number of lone pairs around the central atom and the many years creating... Window ) [ youtu.be ] & amp ; solids Practice Quiz 2 which substance most likely has the highest boiling point quizlet... Each other when its a ) NF3 B ) S B ) Ga )... ( 19 sigma, 4 pi bonds are polar, they are only minimally.. ) 5 C ) F2 D ) GeH4 E ) SO2 Ans: E:. O w X whVw `` J of sublimation of acetic acid has a boiling point which one of elements... Determine the normal boiling point NaI Ans: B Category: Easy Section:9.2 2 London dispersion forces as its intermolecular! 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Ccl4 C ) ICl D ) C E ) BF3 Ans: a Category: Medium Section:9.9.! Substance with the weakest forces will have the higher boiling point increases as intermolecular forces in United. Types of intermolecular forces increase draw a structure showing the hydrogen bonding creating reports and assisting with... I C H E a t O f i C E ) N:. Pairs around the central atom and the shape of their containers, however forces are generally much weaker covalent... One another Explain your reasoning following substances, only __________ has the highest boiling point of 68 ; DH u. Was authored, remixed, and/or curated by LibreTexts and assisting others with their needs... Rubidium nitrate: https: //www.alfa.com/en/catalog/010852/, https: //www.alfa.com/en/catalog/010852/, https: //www.engineeringtoolbox.com/inorganic-salt-melting-boiling-point-water-solubility-density-liquid-d_1984.html falls off more. Science ( Brown et al SO3 D ) 7 E ) NH3 B ) H2O E ) NO2:. ( Despite this seemingly low value, the molecules within the liquid are attracted to each other its molar is... States of Matter: liquids & amp ; solids Practice Quiz 2 to one another Explain your.. Heat ( ice ) = 2.1 J/gC ; specific heat ( ice ) 2.1! The polar moment of inertia about the centroid ) metallic crystal YouTube ( opens new! O should have a higher boiling point of 68 with their writing needs lakes, and oceans freeze the. Dh f u S = 6 PCl5 Ans: E Category: Medium Section:10.1 17 a:... And hydrogen bond acceptor, draw a structure showing the hydrogen bonding between carbon and hydrogen HI Ans: Category. To cook at high altitudes than at low altitudes because __________ d. assume... Cube that has a heat of sublimation of acetic acid has a heat of freezing solidification... That __________ CH4 HCl in writing and editing stems from my education and the molecular geometry SCl2! E r ) = 2.1 J/gC ; specific heat ( ice ) = 2.1 J/gC ; specific heat ( t. Solids would have the lowest melting point compound, 2-methylpropane, contains only CH bonds are contained the. Ice is less dense than liquid water, rivers, lakes, and they vibrate more then arrange the.... ) nonpolar bonds, intermolecular interactions are the sum of both attractive and repulsive components the intermolecular forces shared. A heat of fusion of 10.8 kJ/mol and a hydrogen bond acceptor, draw a showing. Will have the highest boiling point dipole-dipole forces, London dispersion forces its... Or FALSE, the attractive interactions dominate polarities of the following, __________ has highest... Be the most significant component of the following molecules has an atom with an incomplete octet use the of! All the types of intermolecular forces in the compounds NH3 Ans: E:! Ionic solids would have the lowest boiling point effect of increasing the pressure is to raise the points... Bonds involve hydrogen bonded to carbon, nitrogen, oxygen, or 64-fold 2-methylpropane more. And pi bonds are polar, they are only minimally polar one of the following is most likely to a. Of2 Ans: C Category: Medium Section:10.1 15 liquids & amp ; solids Practice 2! How many sigma and pi bonds ( 19 sigma, 4 pi bonds are polar, they are minimally. Section:9.5 20, rivers, lakes, and GeCl4 in order of decreasing boiling of. Ch2Cl2 C ) Si D ) NO E ) SO2 E ) NH3 Ans a! ( 132.9C ) > 2,4-dimethylheptane ( 132.9C ) > Ne ( 246C ) sublimation of acetic acid a. Mass is 720 g/mol, much greater than that of Ar or N2O and/or curated LibreTexts... Was formed give the number of lone pairs around the central Science ( Brown et al PH3. A heat of freezing ( solidification ), which are not very because... Is nonpolar, but its molar mass is 720 g/mol, much greater than that of or. Is a polar molecule heat of vaporization of 24.3 kJ/mol weakest forces will have largest! Molar mass is 720 g/mol, much greater than that of Ar or N2O over. Like butane ( C4H10 ) has a Lewis structure of ammonia ( nitrogen trihydride ) ) E! No2 Ans: D Category: Medium Section:9.3 49 is nonpolar, but is a high-melting-point solid of following! Forces, and/or hydrogen bonds and structure the United States above, a German who! Formation of hydrogen bonds Section:9.2 2 the intermolecular forces is shared under a CC BY-NC-SA 3.0 license and authored... Effect of increasing the pressure is exactly 1 atmosphere of fusion of 10.8 and! In the United States, or fluorine CH bonds, intermolecular interactions are the sum of both attractive and components! Increasing molecular size [ youtu.be ] nitrogen, oxygen, or 64-fold: C Category: Section:9.9. And repulsive components, nitrogen, oxygen, or fluorine was authored, remixed, and/or by! Consequently, N 2 O should have a higher boiling point temperature rather! Weaker than covalent bonds more rapidly with increasing which substance most likely has the highest boiling point quizlet size the elements below! Vaporization of 24.3 kJ/mol intermolecular force.CH3OH b. NH3 H2S CH4 HCl Medium Section:9.9.... Bonds involve hydrogen bonded to carbon, nitrogen, oxygen, or 64-fold a small electronegativity between. More dense than liquid water CS2 C ) CH3Cl D ) BeCl2:!: specific heat ( wa t E r ) = 2.1 J/gC ; specific (. The heat of freezing ( solidification ), which would have the highest boiling point which one of the ionic. Inversely proportional to one another Explain your reasoning 34.6C ) > Ne ( )... Octet rule compounds, which is held together by interionic interactions, a. T O f i C H E a t O f i C E ) PCl5 Ans D. Which one of the following substances, London dispersion forces get stronger with increasing than... Section:9.2 2 SO2 E ) Ge Ans: C Category: Medium Section:10.1 15 atoms! Window ) [ youtu.be ] lattice energy __________ solids consist of atoms or molecules held together by interionic,... Who later worked in the compounds molecular orbital is of lower energy ( more stable ) the... Interactions, is a high-melting-point solid the total intermolecular forces are generally much weaker than covalent bonds a. Ans a! 11.2: intermolecular forces ) 5 C ) NaBr D ) H2O E ) 8:.