Question 1

Stearic acid,a fatty acid commonly found in animal fat,has a condensed chemical formula of CH3(CH2) 16COOH.It is a common component of soaps and detergents.Which of the following statements is false?

Accepted Answer

A)  The -COOH group would experience hydrogen bonding with water.
B)  The long alkane "tail," CH3(CH2) 16-,is hydrophobic.
C)  Stearic acid and water are probably miscible.
D)  Stearic acid would probably dissolve in nonpolar solvents such as hexane,C6H14.
E)  Stearic acid contains hydrophilic and hydrophobic regions.F) None of the above
G) B) and D)

Question 2

Why do the strengths of dispersion interactions generally increase with the molar mass of the compound?

Accepted Answer

A molecule with the larger molar mass ha...

Question 3

Which liquid,water or ethanol,would you expect to have the higher surface tension and viscosity? Explain.

Accepted Answer

Water would have higher surface tension ...

Question 4

The relative energies (strengths) of the intermolecular forces present in each of five different pure substances are shown in the figure below.Which substance has the highest melting point?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) B) and E)
G) B) and C)

Question 5

Use the phase diagram to answer the following questions.
a.What phase or phases are present at A,B,and C?
b.What phase or phases are present along line E?
c.What phase or phases are present at point D,and what is this point called?
d.What is the name of point F? What phase or phases are present at higher pressures and temperatures?
e.What physical quantity is on the x-axis? On the y-axis?

Accepted Answer

a.In region A,the substance is solid; in...

Question 6

The solubility of a compound may depend on many factors,including __________

Accepted Answer

A)  solute-solvent interactions.
B)  solute-solute interactions.
C)  solvent-solvent interactions.
D)  physical parameters such as temperature.
E)  all of the items listed.F) A) and E)
G) C) and D)

Question 7

Which of the following compounds would you predict can experience only dispersion forces?

Accepted Answer

A)  ICl5
B)  CH3Cl
C)  PCl5
D)  CH3OCH3
E)  (CH3) 3NF) All of the above
G) B) and E)

Question 8

Point d in the phase diagram below is the __________

Accepted Answer

A)  critical point.
B)  triple point.
C)  transition point.
D)  normal freezing point.
E)  normal boiling point.F) D) and E)
G) B) and C)

Question 9

Which of the following compounds is capable of hydrogen bonding?

Accepted Answer

A)  CH4
B)  H2CO
C)  HCN
D)  HCl
E)  HNO2F) D) and E)
G) A) and D)

Question 10

Which of the following polar compounds is likely to have the highest boiling point?

Accepted Answer

A)  CH3CH2CH3
B)  CH3CH2OH
C)  (CH3) 2CO
D)  H2CO
E)  COF) D) and E)
G) C) and E)

Question 11

Indicate whether the following pairs of molecules can interact via hydrogen bonding and give your reasoning.
(a)CH3NH2 to CH3NH2; (b)CH3CH2OH to CH3OCH3; (c)CH3CH2CHO to CH3OCH3; and (d)(CH3)3N to CH3COCH3.

Accepted Answer

Hydrogen bonding requires H directly bon...

Question 12

Molecular nitrogen (N2) interacts with water and is sparingly soluble in water due to _________

Accepted Answer

A)  dispersion forces.
B)  dipole-induced dipole forces.
C)  ion-dipole forces.
D)  hydrogen bonding.
E)  dipole-dipole forces.F) A) and E)
G) B) and C)

Question 13

Which of the following statements regarding dispersion forces is false?

Accepted Answer

A)  Electrons in one molecule can experience attractions to nuclei in a neighboring nonbonded molecule.
B)  Temporary dipoles can arise when electrons are temporarily asymmetrically redistributed around the nucleus of an atom or within a bond.
C)  As electron cloud size increases,the strength of dispersion forces increases.
D)  The dipole moments associated with dispersion forces are long-lasting.
E)  Temporary dipoles can induce dipoles in other particles.F) C) and E)
G) C) and D)

Question 14

Which of the following diagrams best shows a set of polar molecules interacting through dipole-dipole interactions?

Accepted Answer

A)   
B)   
C)   
D)   
E)  all of theseF) B) and C)
G) C) and D)

Question 15

Identify the dominant intermolecular interaction or interactions that must be overcome when solid carbon dioxide (CO2)sublimes,when water (H2O)melts,and when acetone (CH3COCH3)evaporates.

Accepted Answer

Carbon dioxide is nonpolar so ...

Question 16

Describe the similarity and the difference between sublimation and evaporation.

Accepted Answer

In both sublimation and evapor...

Question 17

Which of the following would you predict has the highest polarizability?

Accepted Answer

A)  CO2
B)  CBr4
C)  Cl2
D)  CH4
E)  CCl4F) A) and B)
G) All of the above

Question 18

Consider the phase diagram for a substance shown here.The solid phase is ________ than the liquid phase.

Accepted Answer

A)  more dense
B)  less dense
C)  more massive
D)  less massive
E)  hotterF) All of the above
G) A) and B)

Question 19

Which of the following gases is likely to condense at the highest temperature (gas  →\rightarrow→  liquid) ?

Accepted Answer

A)  NH3
B)  HCl
C)  CH4
D)  PH3
E)  SiH4 F) B) and E)
G) A) and B)

Question 20

Which of the following solvents could involve ion-dipole interactions with Na+?

Accepted Answer

A)  benzene (C6H6) 
B)  carbon tetrachloride (CCl4) 
C)  chloroform (CHCl3) 
D)  cyclohexane (C6H12) 
E)  pentane (C5H12) F) A) and D)
G) A) and C)

Exam 6: Intermolecular Forces-Attractions Between Particles

Which of the following compounds is capable of hydrogen bonding?

Correct Answer
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Identify the dominant intermolecular interaction or interactions that must be overcome when solid carbon dioxide (CO₂)sublimes,when water (H₂O)melts,and when acetone (CH₃COCH₃)evaporates.

Correct Answer
verified
Carbon dioxide is nonpolar so ...
View Answer

Which of the following polar compounds is likely to have the highest boiling point?

Correct Answer
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The relative energies (strengths) of the intermolecular forces present in each of five different pure substances are shown in the figure below.Which substance has the highest melting point?

Correct Answer
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Which of the following gases is likely to condense at the highest temperature (gas $\rightarrow$ liquid) ?

Correct Answer
verified

Stearic acid,a fatty acid commonly found in animal fat,has a condensed chemical formula of CH₃(CH₂) ₁₆COOH.It is a common component of soaps and detergents.Which of the following statements is false?

Correct Answer
verified

Which of the following statements regarding dispersion forces is false?

Correct Answer
verified

Which of the following compounds would you predict can experience only dispersion forces?

Correct Answer
verified

Which of the following would you predict has the highest polarizability?

Correct Answer
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Correct Answer
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a.In region A,the substance is solid; in...
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Molecular nitrogen (N₂) interacts with water and is sparingly soluble in water due to _________

Correct Answer
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Consider the phase diagram for a substance shown here.The solid phase is ________ than the liquid phase.

Correct Answer
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Describe the similarity and the difference between sublimation and evaporation.

Correct Answer
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In both sublimation and evapor...
View Answer

Which liquid,water or ethanol,would you expect to have the higher surface tension and viscosity? Explain.

Correct Answer
verified
Water would have higher surface tension ...
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Which of the following diagrams best shows a set of polar molecules interacting through dipole-dipole interactions?

Correct Answer
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Which of the following solvents could involve ion-dipole interactions with Na⁺?

Correct Answer
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The solubility of a compound may depend on many factors,including __________

Correct Answer
verified

Point d in the phase diagram below is the __________

Correct Answer
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Why do the strengths of dispersion interactions generally increase with the molar mass of the compound?

Correct Answer
verified
A molecule with the larger molar mass ha...
View Answer

Indicate whether the following pairs of molecules can interact via hydrogen bonding and give your reasoning. (a)CH₃NH₂ to CH₃NH₂; (b)CH₃CH₂OH to CH₃OCH₃; (c)CH₃CH₂CHO to CH₃OCH₃; and (d)(CH₃)₃N to CH₃COCH₃.

Correct Answer
verified
Hydrogen bonding requires H directly bon...
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Exam 6: Intermolecular Forces-Attractions Between Particles

Which of the following compounds is capable of hydrogen bonding?

Correct AnswerverifiedShow Answer

Identify the dominant intermolecular interaction or interactions that must be overcome when solid carbon dioxide (CO2)sublimes,when water (H2O)melts,and when acetone (CH3COCH3)evaporates.

Correct AnswerverifiedCarbon dioxide is nonpolar so ...View AnswerShow Answer

Which of the following polar compounds is likely to have the highest boiling point?

Correct AnswerverifiedShow Answer

The relative energies (strengths) of the intermolecular forces present in each of five different pure substances are shown in the figure below.Which substance has the highest melting point?

Correct AnswerverifiedShow Answer

Which of the following gases is likely to condense at the highest temperature (gas →\rightarrow→ liquid) ?

Correct AnswerverifiedShow Answer

Stearic acid,a fatty acid commonly found in animal fat,has a condensed chemical formula of CH3(CH2) 16COOH.It is a common component of soaps and detergents.Which of the following statements is false?

Correct AnswerverifiedShow Answer

Which of the following statements regarding dispersion forces is false?

Correct AnswerverifiedShow Answer

Which of the following compounds would you predict can experience only dispersion forces?

Correct AnswerverifiedShow Answer

Which of the following would you predict has the highest polarizability?

Correct AnswerverifiedShow Answer

Correct Answerverifieda.In region A,the substance is solid; in...View AnswerShow Answer

Molecular nitrogen (N2) interacts with water and is sparingly soluble in water due to _________

Correct AnswerverifiedShow Answer

Consider the phase diagram for a substance shown here.The solid phase is ________ than the liquid phase.

Correct AnswerverifiedShow Answer

Describe the similarity and the difference between sublimation and evaporation.

Correct AnswerverifiedIn both sublimation and evapor...View AnswerShow Answer

Which liquid,water or ethanol,would you expect to have the higher surface tension and viscosity? Explain.

Correct AnswerverifiedWater would have higher surface tension ...View AnswerShow Answer

Which of the following diagrams best shows a set of polar molecules interacting through dipole-dipole interactions?

Correct AnswerverifiedShow Answer

Which of the following solvents could involve ion-dipole interactions with Na+?

Correct AnswerverifiedShow Answer

The solubility of a compound may depend on many factors,including __________

Correct AnswerverifiedShow Answer

Point d in the phase diagram below is the __________

Correct AnswerverifiedShow Answer

Why do the strengths of dispersion interactions generally increase with the molar mass of the compound?

Correct AnswerverifiedA molecule with the larger molar mass ha...View AnswerShow Answer

Indicate whether the following pairs of molecules can interact via hydrogen bonding and give your reasoning. (a)CH3NH2 to CH3NH2; (b)CH3CH2OH to CH3OCH3; (c)CH3CH2CHO to CH3OCH3; and (d)(CH3)3N to CH3COCH3.

Correct AnswerverifiedHydrogen bonding requires H directly bon...View AnswerShow Answer

Correct Answer
verified

Identify the dominant intermolecular interaction or interactions that must be overcome when solid carbon dioxide (CO₂)sublimes,when water (H₂O)melts,and when acetone (CH₃COCH₃)evaporates.

Correct Answer
verified
Carbon dioxide is nonpolar so ...
View Answer

Correct Answer
verified

Correct Answer
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Which of the following gases is likely to condense at the highest temperature (gas $\rightarrow$ liquid) ?

Correct Answer
verified

Stearic acid,a fatty acid commonly found in animal fat,has a condensed chemical formula of CH₃(CH₂) ₁₆COOH.It is a common component of soaps and detergents.Which of the following statements is false?

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified
a.In region A,the substance is solid; in...
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Molecular nitrogen (N₂) interacts with water and is sparingly soluble in water due to _________

Correct Answer
verified

Correct Answer
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Correct Answer
verified
In both sublimation and evapor...
View Answer

Correct Answer
verified
Water would have higher surface tension ...
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Correct Answer
verified

Which of the following solvents could involve ion-dipole interactions with Na⁺?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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A molecule with the larger molar mass ha...
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Indicate whether the following pairs of molecules can interact via hydrogen bonding and give your reasoning. (a)CH₃NH₂ to CH₃NH₂; (b)CH₃CH₂OH to CH₃OCH₃; (c)CH₃CH₂CHO to CH₃OCH₃; and (d)(CH₃)₃N to CH₃COCH₃.

Correct Answer
verified
Hydrogen bonding requires H directly bon...
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