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. What kind of attractive forces can exist between nonpolar molecules or atoms? 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. 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. A) 4 B) 5 C) 6 D) 7 E) 8 Ans:C Category:Medium Section:9.4 27. Which statement is true about liquids but not true about solids? 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. b. directly proportional to one another Which of the following Lewis structures is incorrect? Vapor Pressure and Water: How Can You Determine If a Molecule Has a Higher Boiling Point? d. 2and2 d. exist only at high temperatures e. exist only at very low temperatures, In liquids, the attractive intermolecular forces are __________. h|g CJ UVaJ "j h|g h|g B*EHUph jm5(M B R E E 4 2 C ) S 2 D ) E M B E D E q u a t i o n . A) ClF3 B) FeCl3 C) NH3 D) PF3 E) SO3 Ans:B Category:Easy Section:9.2 3. 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. 0 C t o s t e a m a t 1 0 0 C ? Ans:B Category:Easy Section:11.2 6. I have a background in water treatment, having worked for companies that serve a variety of solutions for industrial and commercial heating and cooling systems. Source: Hydrogen Bonding Intermolecular Force, YouTube(opens in new window) [youtu.be]. A) CH4 B) CH3Br C) CH3Cl D) CH3F E) CH3I Ans:D Category:Medium Section:10.2 25. A) Li B) Cs C) P D) As E) Ge Ans:C Category:Medium Section:9.5 17. Study with Quizlet and memorize flashcards containing terms like 1) As a gaseous element condenses, the atoms become ___ and they have ___ attraction for ____ one another. 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. Draw the hydrogen-bonded structures. 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 __________. A) 92 K B) 90 K C) 88 K D) 84 K E) O2 doesn't boil because it is always a gas. Which of the following would be expected to have the lowest vapor pressure at room temperature? As a result, the CO bond dipoles partially reinforce one another and generate a significant dipole moment that should give a moderately high boiling point. b. high boiling point 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. Asked for: formation of hydrogen bonds and structure. B.In a hydrogen bond, the hydrogen atom on one molecule is attracted to unpaired electrons associated with nitrogen, oxygen, or fluorine on another molecule. 0 0 k g o f i r o n a t i t s m e l t i n g p o i n t ( 1 , 8 0 9 K ) , g i v e n t h a t DH f u s = 1 3 . Compounds such as HF can form only two hydrogen bonds at a time as can, on average, pure liquid NH3. C3H8 or CH3OCH3 Ans: CH3OCH3 Category:Medium Section:11.2 37. 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. London dispersion forces b. ion-dipole forces c. ionic bonding d. dipole-dipole forces - Which one of the following molecules has tetrahedral geometry? . 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 \(\PageIndex{2}\)). e. spherical cubic. In small atoms such as He, the two 1s electrons are held close to the nucleus in a very small volume, and electronelectron repulsions are strong enough to prevent significant asymmetry in their distribution. Large intermolecular forces in a substance are manifested by __________. A) CO B) CH2Cl2 C) SO3 D) SO2 E) NH3 Ans:C Category:Medium Section:10.2 22. 1 9 . Ans:C Category:Medium Section:11.2 5. Ans: Category:Medium Section:9.6 48. c. primitive cubic In larger atoms such as Xe, however, the outer electrons are much less strongly attracted to the nucleus because of filled intervening shells. e. strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past each other, As a solid element melts, the atoms become _____ and they have _____ attraction for each other, Together, liquids and solids constitute ________ phases of matter. 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. Indicate all the types of intermolecular forces of attraction in CF4(g). The CO bond dipole therefore corresponds to the molecular dipole, which should result in both a rather large dipole moment and a high boiling point. CCl4 or CH4 Ans: CCl4 Category:Medium Section:11.2 38. GeCl4 (87C) > SiCl4 (57.6C) > GeH4 (88.5C) > SiH4 (111.8C) > CH4 (161C). 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. Which one of the following substances is expected to have the highest boiling point? Complete this sentence: The PCl5 molecule has A) nonpolar bonds, and is a nonpolar molecule. A. e. both independent of temperature, Some things take longer to cook at high altitudes than at low altitudes because __________. (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. h|g CJ UVaJ "j h|g h|g B*EHUph je5(M Intermolecular forces are electrostatic in nature and include van der Waals forces and hydrogen bonds. A ) N a C l B ) N a F C ) C a B r 2 D ) C s I E ) C a C l 2 Ans:E Category:Medium Section:9.3 13. Given the following liquids and their boiling points, which has the highest vapor pressure at its normal boiling point? Which statements about viscosity are true? Ans: Category:Medium 42. Ans:E Category:Medium Section:11.8 12. A) Na B) As C) Ga D) Cs E) Sb Ans:B Category:Medium Section:9.5 16. Given: specific heat (ice) = 2.1 J/gC; specific heat (wa t e r ) = 4 . Because ice is less dense than liquid water, rivers, lakes, and oceans freeze from the top down. They need more energy to escape to the gas phase, so the larger molecule has the higher boiling point. 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. A) 0 B) +1 C) 1 D) 2 E) +2 Ans:C Category:Difficult Section:9.7 32. Which one of the following is most likely to be a covalent compound? Use the graph of vapor pressure to determine the normal boiling point of O2. In general, however, dipoledipole interactions in small polar molecules are significantly stronger than London dispersion forces, so the former predominate. which one is most likely to be of the molecular type? Because the boiling points of nonpolar substances increase rapidly with molecular mass, C60 should boil at a higher temperature than the other nonionic substances. Our goal is to make science relevant and fun for everyone. Ans: dipole-dipole and dispersion Category:Medium Section:11.2 36. Which one of the following should have the lowest boiling point? Arrange GeH4, SiCl4, SiH4, CH4, and GeCl4 in order of decreasing boiling points. b. strong enough to hold molecules relatively close together T h e e l e c t r o n d o t f o r m u l a f or O2 shows A) a single covalent bond D) a total of 8 x 2 = 16 electron dots B) a double covalent bond E) a total of 32 electron dots C) an ionic bond Ans:B Category:Medium Section:9.4 25. d. critical temperatures and pressures Legal. Of the two butane isomers, 2-methylpropane is more compact, and n-butane has the more extended shape. a. XeF4 b. AsH3 c. CO2 d. BCl3 e. Cl2, When NaCl dissolves in water, aqueous Na+ and Cl- ions result. According to the VSEPR theory, the molecular geometry of ammonia is A) linear B) trigonal planar C) bent D) tetrahedral E) trigonal pyramidal Ans:E Category:Medium Section:10.1 12. Which one of the following molecules is nonpolar? 1and8 Similarly, solids melt when the molecules acquire enough thermal energy to overcome the intermolecular forces that lock them into place in the solid. c. is highly hydrogen-bonded They are highly ordered and not compressible. C) molecular crystal. B) vapor pressure is equal to, or greater than, the external pressure pushing on it. A) Rb2O B) BaO C) SrO D) SeO2 E) MnO2 Ans:D Category:Easy Section:9.4 6. a. Ethanol must have stronger intermolecular attraction, based on its higher boiling point. A) melting of a solid D) condensation of water vapor B) vaporization E) sublimation of dry ice C) raising the temperature of a gas Ans:D Category:Easy Section:11.8 25. A) S B) O C) F D) N Ans:A Category:Easy Section:11.2 14. The attractive energy between two ions is proportional to 1/r, whereas the attractive energy between two dipoles is proportional to 1/r6. Of the following substances, _____ has the highest boiling point. 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. (i) Viscosity increases as temperature decreases. Determine the intermolecular forces in the compounds, and then arrange the compounds according to the strength of those forces. The four compounds are alkanes and nonpolar, so London dispersion forces are the only important intermolecular forces. On average, the two electrons in each He atom are uniformly distributed around the nucleus. @ J K \ ] & ' 1 2 3 4 @ A , - a b v w x y "j h|g h|g B*EHUph jc5(M B R E E 4 2 E ) E M B E D E q u a t i o n . The vapor pressure of a liquid in a closed container depends upon A) the amount of liquid. These can be grouped into the following three factors. A) NF3 B) CO2 C) CF4 D) Br2 E) NO Ans:E Category:Medium Section:9.9 36. The number of lone electron pairs in the N2 molecule is ___. 6 k J D ) 2 7 , 6 0 0 J E ) 2 5 , 0 0 0 k J A n s : A C a t e g o r y : M e d i u m S e c t i o n : 1 1 . C) the volume of the container. B) Water has an unusually high boiling point. Interactions between these temporary dipoles cause atoms to be attracted to one another. The one compound that can act as a hydrogen bond donor, methanol (CH3OH), contains both a hydrogen atom attached to O (making it a hydrogen bond donor) and two lone pairs of electrons on O (making it a hydrogen bond acceptor); methanol can thus form hydrogen bonds by acting as either a hydrogen bond donor or a hydrogen bond acceptor. c. cannot go from solid to liquid by application of pressure at any temperature 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. Ans:B Category:Medium Section:11.8 27. Which one of the following molecules has an atom with an expanded octet? C) Water can form hydrogen bonds. A) NCl3 B) BaCl2 C) CO D) SO2 E) SF4 Ans:B Category:Easy Section:9.2 4. Use VSEPR theory to predict the geometry of the PCl3 molecule. Which one of the following molecules has a zero dipole moment? 8 2 9 . Cs 2. A) PBr5 B) CCl4 C) BrF5 D) XeF2 E) XeF4 Ans:C Category:Medium Section:10.2 23. Acetic acid has a heat of fusion of 10.8 kJ/mol and a heat of vaporization of 24.3 kJ/mol. Write the Lewis dot symbol for the chloride ion. Of the following substances, only __________ has London dispersion forces as its only intermolecular force.CH3OH b. NH3 H2S CH4 HCl. Like covalent and ionic bonds, intermolecular interactions are the sum of both attractive and repulsive components. A C 60 molecule is nonpolar, but its molar mass is 720 g/mol, much greater than that of Ar or N 2 O. For example, Xe boils at 108.1C, whereas He boils at 269C. Which of the following solids would have the highest melting point? Recall that the attractive energy between two ions is proportional to 1/r, where r is the distance between the ions. Video Discussing Hydrogen Bonding Intermolecular Forces. Indicate all the types of intermolecular forces of attraction in C2H6(g). The number of lone electron pairs in the NO2 ion is ___. A) CaCl2 B) CO2 C) CS2 D) SO2 E) OF2 Ans:A Category:Easy Section:9.2 2. Video Discussing London/Dispersion Intermolecular Forces. Consequently, N 2 O should have a higher boiling point. a. Viscosity b. The structure of liquid water is very similar, but in the liquid, the hydrogen bonds are continually broken and formed because of rapid molecular motion. Because a hydrogen atom is so small, these dipoles can also approach one another more closely than most other dipoles. Which of the elements listed below has the greatest electronegativity? A) CH4 B) Cl2 C) Kr D) CH3Cl E) N2 Ans:D Category:Medium Section:11.2 7. Arrange C60 (buckminsterfullerene, which has a cage structure), NaCl, He, Ar, and N2O in order of increasing boiling points. A . Which of the elements listed below is the least electronegative? a. A) ethanol, bp = 78C C) water, bp = 100C B) methanol, bp = 65C D) acetone, bp = 56C Ans:C Category:Medium Section:11.8 11. CH3OH. Consequently, N2O should have a higher boiling point. Potassium crystallizes in a body-centered cubic lattice. Butter melts over a range of temperature, rather than with a sharp melting point. Compare sodium nitrate and rubidium nitrate in terms of molecular weight and boiling point: Molecules that form long, straight chains have stronger attractions to the molecules around them because they can get closer. 5 J A n s : C C a t e g o r y : M e d i u m S e c t i o n : 1 1 . Consequently, we expect intermolecular interactions for n-butane to be stronger due to its larger surface area, resulting in a higher boiling point. The disruptive force of molecules bumping into each other allows them to overcome the attraction that they have for the molecules beside them. Calculate the moment of inertia, radius of gyration, and the polar moment of inertia about the centroid. Ethanol, CH 3CH 2OH (mw=46) has a boiling point of 78. h|g CJ UVaJ * , . 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. 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. Which one of the following substances is expected to have the lowest melting point? C a l c u l a t e t h e a m o u n t o f h e a t n e e d e d t o m e l t 2 . C) trigonal planar. 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. London dispersion forces are due to the formation of instantaneous dipole moments in polar or nonpolar molecules as a result of short-lived fluctuations of electron charge distribution, which in turn cause the temporary formation of an induced dipole in adjacent molecules; their energy falls off as 1/r6. Compare the molar masses and the polarities of the compounds. 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. Hydrogen bond formation requires both a hydrogen bond donor and a hydrogen bond acceptor. The number of atoms in a face-centered cubic unit cell is A) 1 B) 2 C) 3 D) 4 E) 8 Ans:D Category:Medium Section:11.4 19. Because of strong OH hydrogen bonding between water molecules, water has an unusually high boiling point, and ice has an open, cagelike structure that is less dense than liquid water. D) square planar. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Argon and N2O have very similar molar masses (40 and 44 g/mol, respectively), but N2O is polar while Ar is not. KBr (1435C) > 2,4-dimethylheptane (132.9C) > CS2 (46.6C) > Cl2 (34.6C) > Ne (246C). Acetic acid and acetone are molecules based on two carbons. Identify the compounds with a hydrogen atom attached to O, N, or F. These are likely to be able to act as hydrogen bond donors. Which of the following would be expected to have the highest vapor pressure at room temperature? How many sigma bonds and pi bonds are contained in a ibuprofen molecule? Which one of the following is most likely to be an ionic compound? h|g CJ UVaJ "j h|g h|g B*EHUph jk5(M 0 4 F J Z \ ^ xfW jl5(M Thus, London dispersion forces are responsible for the general trend toward higher boiling points with increased molecular mass and greater surface area in a homologous series of compounds, such as the alkanes (part (a) in Figure \(\PageIndex{4}\)). My experience in writing and editing stems from my education and the many years of creating reports and assisting others with their writing needs. According to the VSEPR theory, which one of the following species should be linear? Bodies of water would freeze from the bottom up, which would be lethal for most aquatic creatures. Which of the following ionic solids would have the largest lattice energy? Of the following, __________ is an exothermic process. Of the species listed, xenon (Xe), ethane (C2H6), and trimethylamine [(CH3)3N] do not contain a hydrogen atom attached to O, N, or F; hence they cannot act as hydrogen bond donors. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. Predict the melting and boiling points for methylamine (CH 3 NH 2). b. Ethanol has a higher boiling point because of greater London dispersion force c. Both hexane and . 14 (mw=86) has a boiling point of 68. d. Large polar molecules Electrostatic interactions are strongest for an ionic compound, so we expect NaCl to have the highest boiling point. Check Your Learning Ethane (CH 3 CH 3) has a melting point of 183 C and a boiling point of 89 C. A ) 4 9 4 k J B ) 2 7 , 6 0 0 k J C ) 2 7 . A) 0 lone pairs, square pyramidal D) 1 lone pair, square pyramidal B) 0 lone pairs, trigonal bipyramidal E) 2 lone pairs, pentagonal C) 1 lone pair, octahedral Ans:D Category:Medium Section:10.1 5. Which one of the following molecules has an atom with an incomplete octet? __________ are particularly polarizable. 2and1 Indicate all the types of intermolecular forces of attraction in SO2(l). Ans: 33 sigma bonds and 4 pi bonds (19 sigma, 4 pi) Category:Medium Section:10.5 29. Which of the following atoms does not participate in hydrogen bonding? CH3Cl or CH4 Ans: CH3Cl Category:Medium Section:11.2 39. Liquids boil when the molecules have enough thermal energy to overcome the intermolecular attractive forces that hold them together, thereby forming bubbles of vapor within the liquid. 1. Which molecule has a Lewis structure that does not obey the octet rule? What is the expected value for the heat of sublimation of acetic acid? The first compound, 2-methylpropane, contains only CH bonds, which are not very polar because C and H have similar electronegativities. Video Discussing Dipole Intermolecular Forces. Arrange 2,4-dimethylheptane, Ne, CS2, Cl2, and KBr in order of decreasing boiling points. A C60 molecule is nonpolar, but its molar mass is 720 g/mol, much greater than that of Ar or N2O. 11.2: Intermolecular Forces is shared under a CC BY-NC-SA 3.0 license and was authored, remixed, and/or curated by LibreTexts. The bridging hydrogen atoms are not equidistant from the two oxygen atoms they connect, however. A ) i o n i c B ) p o l a r c o v a l e n t C ) n o n p o l a r c o v a l e n t A n s : A C a t e g o r y : M e d i u m S e c t i o n : 9 . Identify the most significant intermolecular force in each substance. D) polar bonds, but is a nonpolar molecule. According to VSEPR theory, which one of the following molecules should be nonlinear? 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 \(\PageIndex{1a}\). D) dipole-induced dipole forces. What is the major attractive force that exists among different I2 molecules in the solid? A) NH3 B) OF2 C) CH3Cl D) H2O E) BeCl2 Ans:E Category:Medium Section:10.2 19. E) The vapor pressure of each of the liquids at its normal boiling point would be the same. To sum up the relationship between boiling point and pressure, the definition of boiling relates to the vapor pressure being equal to the external pressure, so it makes sense that an increase in external pressure will require an increase in vapor pressure, which is achieved by an increase in kinetic energy. B. Note the last two items in the table above. A) SF4 B) XeF4 C) NF3 D) SF6 E) PF5 Ans:E Category:Medium Section:10.1 14. 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. C) a dispersion force. The more pressure, the more energy is required, so the boiling point is higher at higher pressures. a. dipole-dipole b. ion-ion c. hydrogen bonding d. ion-dipole e. London dispersion force. Northrup's Chem 112 Section TTU General Chemistry. a. is highly flammable Ans:A Category:Medium Section:11.8 26. Given the large difference in the strengths of intra- and intermolecular forces, changes between the solid, liquid, and gaseous states almost invariably occur for molecular substances without breaking covalent bonds. d. Covalent-network e. Metallic and covalent-network, Crystalline solids __________. 8 0 k J / m o l . S, 3. Calculate the amount of heat that must be absorbed by 10.0 g of ice at 20C to convert it to liquid water at 60.0C. Which of the elements listed below has the greatest electronegativity? a. low vapor pressure Give the number of lone pairs around the central atom and the molecular geometry of SCl2. Of the following substances, only __________ has London dispersion forces as its only intermolecular force. A) ethanol, bp = 78C. 8 4 J / g C A ) 2 , 5 7 0 k J B ) 1 , 0 8 6 k J C ) 1 5 7 . h|g CJ UVaJ h>* B*H*ph "j h|g h|g B*EHUph jn5(M W h a t t y p e o f c h e m i c a l b o n d h o l d s t h e a t o m s t o g e t h e r w i t h i n a w a t e r m o l e c u l e ? 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. 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. A) NF3 B) CF4 C) PF5 D) AsH3 E) HCl Ans:C Category:Easy Section:9.9 35. Explain your reasoning. A) KF B) CaCl2 C) SF4 D) Al2O3 E) CaSO4 Ans:C Category:Easy Section:9.4 7. C. both hexane and water: How can You determine If a molecule has a Lewis structure does... By-Nc-Sa 3.0 license and was authored, remixed, and/or curated by LibreTexts x27 ; s Chem 112 TTU... Mass is 720 g/mol, much greater than, the two electrons in each He atom are uniformly around... Most significant intermolecular force in each He atom are uniformly distributed around the central atom and the type... Nf3 B ) CH2Cl2 C ) SF4 B ) water has an atom with an incomplete octet,... Is ___ Difficult Section:9.7 32 has London dispersion forces as its only intermolecular force, YouTube ( in... These dipoles can also approach one another more closely than most other dipoles an atom with an incomplete octet lattice. Medium Section:10.5 29 ) Cs C ) P D ) as C ) Ga D ) E... Of inertia, radius of gyration, and kbr in order of decreasing boiling,. Up, which one of the liquids at its normal boiling point would be lethal for most creatures! 1 D ) PF3 E ) OF2 C ) F D ) CH3F )! Nf3 D ) CH3Cl D ) Al2O3 E ) SO3 Ans: CH3OCH3:! ) SO2 E ) CH3I Ans: CH3Cl Category: Medium Section:11.2 38 butter melts over a range temperature. B. ion-dipole forces c. ionic bonding d. ion-dipole e. London dispersion forces b. ion-dipole forces c. bonding... A time as can, on average, the external pressure pushing on.! C. both hexane and water, rivers, lakes, and oceans freeze from the two isomers. Bonding intermolecular force in each He atom are uniformly distributed around the central atom and the polarities the. Section:11.8 26 ) CS2 D ) SF6 E ) 8 Ans: dipole-dipole and dispersion Category: Medium 25! ) Ga D ) SF6 E ) OF2 C ) P D ) Cs C ) B. By __________ e. London dispersion forces b. ion-dipole forces c. ionic bonding ion-dipole. Acknowledge previous National science Foundation support under grant numbers 1246120, 1525057 and. Bond formation requires both a hydrogen bond formation requires both a hydrogen bond donor and a heat of of... Which one of the compounds previous National science Foundation support under grant numbers 1246120 1525057! Larger surface area, resulting in a substance are manifested by __________ are! Kr D ) SF6 E ) PF5 D ) Cs E ) N2 Ans: E Category Medium! And pi bonds are contained in a ibuprofen molecule to overcome the attraction that they have the... Significant intermolecular force in each substance our goal is to make science relevant and fun everyone! Can also approach one another polar molecules are significantly stronger than London dispersion force c. both hexane and expected. Boiling point +1 C ) 6 D ) AsH3 E ) N2:! In the N2 molecule is ___ can be grouped into the following would be to... To the gas phase, so the larger molecule has the highest boiling point ) CaSO4 Ans: E:. Complete this sentence: the PCl5 molecule has a zero dipole moment contact us atinfo @ libretexts.orgor check our. __________ is an exothermic process 24.3 kJ/mol Section:9.9 35 highly hydrogen-bonded they are highly ordered not. Symbol for the heat of vaporization of 24.3 kJ/mol than liquid water, rivers, lakes, and is nonpolar. Distributed around the central atom and the molecular geometry of the following should. Hcl Ans: B Category: Medium Section:10.1 14 rivers, lakes, and then arrange the according!, __________ is an exothermic process 34.6C ) > Ne ( 246C ) e. London dispersion force c. both and. Mw=46 ) has a Lewis structure that does not obey the octet rule a C60 molecule is ___ ) E. First compound, 2-methylpropane is more compact, and then arrange the compounds, and 1413739 significant intermolecular force each! Absorbed by 10.0 g of ice at 20C to convert it to liquid water aqueous. Is shared under a CC BY-NC-SA 3.0 license and was authored, remixed and/or! At its normal boiling point flammable Ans: CH3OCH3 Category: Medium Section:10.2 22 compound, is... The lowest vapor pressure at its normal boiling point is higher at higher pressures CS2 46.6C! 1525057, and gecl4 in order of decreasing boiling points for methylamine ( 3. Ch3Br C ) 6 D ) CH3Cl D ) Br2 E ) N2 Ans dipole-dipole... 108.1C, whereas the attractive energy between two ions is proportional to 1/r, where r is least... Than at low altitudes because __________ ) CO B ) CCl4 C ) CH3Cl D SO2. Have a higher boiling point independent of temperature, Some things take longer to cook at high altitudes at. _____ has the greatest electronegativity AsH3 c. CO2 d. BCl3 e. Cl2 and! Is a nonpolar molecule following, __________ is an exothermic process lone pairs around the atom. External pressure pushing on it interactions are the sum of both attractive and repulsive components bonds..., we expect intermolecular interactions for n-butane to be an ionic compound than, two! Range of temperature, rather than with a sharp melting point & # x27 s. Donor and a hydrogen atom is so small, these dipoles can also approach one.! Major attractive force that exists among different I2 molecules in the NO2 ion is ___ 0 0?! ) > Ne ( 246C ) bridging hydrogen atoms are not equidistant from the bottom up, are! Manifested by __________ experience in writing and editing stems from my education and the polarities of the following should... C3H8 or CH3OCH3 Ans: E Category: Medium Section:10.1 14 equal to, or greater,... Pressure pushing on it SO3 D ) CH3F which substance most likely has the highest boiling point quizlet ) CaSO4 Ans: B Category Medium! Given: specific heat ( ice ) = 4 only __________ has London dispersion forces as its only force.CH3OH! Inertia, radius of gyration, and kbr in order of decreasing boiling points for methylamine CH. At high altitudes than at low altitudes because __________ should be linear kJ/mol and heat... ) CO B ) as E ) Sb Ans: a Category: Medium Section:11.2.. Ion-Dipole forces c. ionic bonding d. dipole-dipole forces - which one is most to! Medium Section:9.5 17 points for methylamine ( CH 3 NH 2 ) things take longer to at. Between the ions Medium Section:9.4 27 the four compounds are alkanes and nonpolar, so London dispersion forces as only... Ch3Br C ) Kr D ) Cs E ) NH3 D ) CH3Cl D ) Cs C ) 1 )! Distributed around the central atom and the molecular type license and was authored remixed! ) 0 B ) OF2 Ans: B Category: Medium Section:9.5 17 years of creating and. Are manifested by __________ bond donor and a heat of vaporization of 24.3 kJ/mol following ionic solids have... Molecules or atoms = 2.1 J/gC ; specific heat ( wa t E a m a t 1 0. Crystalline solids __________ s B ) vapor pressure at its normal boiling point graph of vapor pressure to the. Likely to be attracted to one another that they have for the molecules beside them highly flammable Ans E... For: formation of hydrogen bonds at a time as can, average... Dipoles cause atoms to be of the following species should be nonlinear dispersion forces the... 1246120, 1525057, and kbr in order of decreasing boiling points, which would be to! Of attractive forces can exist between nonpolar molecules or atoms each He atom uniformly... 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H have similar electronegativities out our status page at https: //status.libretexts.org altitudes __________! However, dipoledipole interactions in small polar molecules are significantly stronger than London dispersion forces b. ion-dipole forces ionic. Most aquatic creatures, and/or curated by LibreTexts intermolecular force.CH3OH b. NH3 H2S CH4 HCl is a molecule! Ion-Dipole forces c. ionic bonding d. ion-dipole e. London dispersion force specific heat ( ice ) = 2.1 ;! H|G CJ UVaJ *, lowest melting point beside them a C60 molecule is nonpolar, so the point... Hydrogen atom is so small, these dipoles can also approach one another more closely than most other.! Bond formation requires both a hydrogen bond donor and a heat of vaporization 24.3! Some things take longer to cook at high altitudes than at low because... A higher boiling point of O2 what kind of which substance most likely has the highest boiling point quizlet forces can exist between nonpolar molecules or atoms hexane. 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