Question 1

Which of the following statements is false?

Accepted Answer

A)  The absolute value of the heat of sublimation is equal to the absolute value of the heat of deposition.
B)  The heat of sublimation is equal to the sum of the heat of vaporization and the heat of melting.
C)  The heat of sublimation is equal to the sum of the heat of vaporization and the heat of freezing.
D)  The absolute value of the heat of sublimation is equal to the absolute value of the sum of the heat of condensation and the heat of freezing.
E)  The absolute value of the heat of deposition is equal to sum of the absolute value of the heat of vaporization and the absolute value of the heat of freezing.

Question 2

What type(s) of intermolecular forces exist between Br2 and CCl4?

Accepted Answer

A)  dispersion forces
B)  dispersion forces and ion-dipole
C)  dispersion forces and dipole-dipole
D)  dispersion forces, ion-dipole, and dipole-dipole
E)  None. Since both are gases at room temperature, they do not interact with each other.

Question 3

What types of intermolecular forces exist between NH3 and CBr4?

Accepted Answer

A)  dispersion forces and dipole-dipole forces
B)  dispersion forces and dipole-induced dipole forces
C)  dispersion forces and hydrogen bonds
D)  dispersion forces, hydrogen bonds, and induced dipole-induced dipole forces
E)  dispersion forces, hydrogen bonds, and dipole-induced dipole forces

Question 4

Which one of the following should have the lowest boiling point?

Accepted Answer

A)  PH3
B)  H2S
C)  HCl
D)  SiH4
E)  H2O

Question 5

The slope of a plot of the natural log of the vapor pressure of a substance versus 1/T is __________.

Accepted Answer

A)  ΔHvap
B)  -ΔHvap
C)   vap 
B)  -ΔHvap 
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Question 6

How high a liquid will rise up a narrow tube as a result of capillary action depends on __________.

Accepted Answer

A)  the magnitudes of cohesive forces in the liquid and adhesive forces between the liquid and the tube, and gravity
B)  gravity alone
C)  only the magnitude of adhesive forces between the liquid and the tube
D)  the viscosity of the liquid
E)  only the magnitude of cohesive forces in the liquid

Question 7

Heat of sublimation can be approximated by adding together __________ and __________.

Accepted Answer

A)  heat of fusion, heat of condensation
B)  heat of fusion, heat of vaporization
C)  heat of freezing (solidification) , heat of condensation
D)  heat of freezing (solidification) , heat of vaporization
E)  heat of deposition, heat of vaporization

Question 8

Molecules with only single bonds do not generally exhibit liquid-crystalline properties because __________.

Accepted Answer

A)  molecules without multiple bonds lack the rigidity necessary for alignment
B)  molecules without multiple bonds are too small to exhibit liquid-crystalline properties
C)  molecules with only single bonds are gases
D)  molecules with only single bonds are too big to exhibit liquid-crystalline properties
E)  molecules without multiple bonds lack the flexibility necessary for alignment

Question 9

The enthalpy change for converting 1.00 mol of ice at -50.0°C to water at 70.0°C is __________ kJ. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K, respectively. For H2O, ΔHfus = 6.01 kJ/mol, and ΔHvap = 40.67 kJ/mol

Accepted Answer

A)  12.28
B)  6.41
C)  13.16
D)  7154
E)  9.40

Question 10

A gas is __________ and assumes __________ of its container whereas a liquid is __________ and assumes __________ of its container.

Accepted Answer

A)  compressible, the volume and shape, not compressible, the shape of a portion
B)  compressible, the shape, not compressible, the volume and shape
C)  compressible, the volume and shape, compressible, the volume
D)  condensed, the volume and shape, condensed, the volume and shape
E)  condensed, the shape, compressible, the volume and shape

Question 11

Under ordinary conditions, a substance will sublime rather than melt if its triple point occurs at a pressure above atmospheric pressure.

Accepted Answer

A) True 
 B)False

Question 12

In general, intramolecular forces determine the __________ properties of a substance and intermolecular forces determine its __________ properties.

Accepted Answer

The answer of In general, intramolecular forces determine the __________...

Question 13

The substance with the largest heat of vaporization is __________.

Accepted Answer

A)  I2
B)  Br2
C)  Cl2
D)  F2
E)  O2

Question 14

Which one of the following substances will have hydrogen bonding as one of its intermolecular forces?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 15

On the phase diagram shown above, the coordinates of point __________ correspond to the critical temperature and pressure.

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  E

Question 16

The predominant intermolecular force in AsH3 is __________.

Accepted Answer

A)  London dispersion forces
B)  ion-dipole forces
C)  ionic bonding
D)  dipole-dipole forces
E)  hydrogen bonding

Question 17

The vapor pressure of any substance at its normal boiling point is

Accepted Answer

A)  1 Pa
B)  1 torr
C)  1 atm
D)  equal to atmospheric pressure
E)  equal to the vapor pressure of water

Question 18

What types of intermolecular forces exist between HI and H2S?

Accepted Answer

A)  dipole-dipole and ion-dipole
B)  dispersion forces, dipole-dipole, and ion-dipole
C)  dispersion forces, hydrogen bonding, dipole-dipole, and ion-dipole
D)  dispersion forces and dipole-dipole

Question 19

The phase changes B → C and D → E are not associated with temperature increases because the heat energy is used up to __________.

Accepted Answer

A)  increase distances between molecules
B)  break intramolecular bonds
C)  rearrange atoms within molecules
D)  increase the velocity of molecules
E)  increase the density of the sample

Question 20

The ease with which the charge distribution in a molecule can be distorted by an external electrical field is called the __________.

Accepted Answer

A)  electronegativity
B)  hydrogen bonding
C)  polarizability
D)  volatility
E)  viscosity

Exam 11: Liquids and Intermolecular Forces

On the phase diagram shown above, the coordinates of point __________ correspond to the critical temperature and pressure.

Correct AnswerverifiedShow Answer

What types of intermolecular forces exist between HI and H2S?

Correct AnswerverifiedShow Answer

The enthalpy change for converting 1.00 mol of ice at -50.0°C to water at 70.0°C is __________ kJ. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K, respectively. For H2O, ΔHfus = 6.01 kJ/mol, and ΔHvap = 40.67 kJ/mol

Correct AnswerverifiedShow Answer

The phase changes B → C and D → E are not associated with temperature increases because the heat energy is used up to __________.

Correct AnswerverifiedShow Answer

The predominant intermolecular force in AsH3 is __________.

Correct AnswerverifiedShow Answer

In general, intramolecular forces determine the __________ properties of a substance and intermolecular forces determine its __________ properties.

Correct AnswerverifiedShow Answer

What types of intermolecular forces exist between NH3 and CBr4?

Correct AnswerverifiedShow Answer

How high a liquid will rise up a narrow tube as a result of capillary action depends on __________.

Correct AnswerverifiedShow Answer

Heat of sublimation can be approximated by adding together __________ and __________.

Correct AnswerverifiedShow Answer

The slope of a plot of the natural log of the vapor pressure of a substance versus 1/T is __________.

Correct AnswerverifiedShow Answer

Which one of the following substances will have hydrogen bonding as one of its intermolecular forces?

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Which of the following statements is false?

Correct AnswerverifiedShow Answer

What type(s) of intermolecular forces exist between Br2 and CCl4?

Correct AnswerverifiedShow Answer

The substance with the largest heat of vaporization is __________.

Correct AnswerverifiedShow Answer

The vapor pressure of any substance at its normal boiling point is

Correct AnswerverifiedShow Answer

Under ordinary conditions, a substance will sublime rather than melt if its triple point occurs at a pressure above atmospheric pressure.

Correct AnswerverifiedShow Answer

Which one of the following should have the lowest boiling point?

Correct AnswerverifiedShow Answer

Molecules with only single bonds do not generally exhibit liquid-crystalline properties because __________.

Correct AnswerverifiedShow Answer

A gas is __________ and assumes __________ of its container whereas a liquid is __________ and assumes __________ of its container.

Correct AnswerverifiedShow Answer

The ease with which the charge distribution in a molecule can be distorted by an external electrical field is called the __________.

Correct AnswerverifiedShow Answer

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What types of intermolecular forces exist between HI and H₂S?

Correct Answer
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The enthalpy change for converting 1.00 mol of ice at -50.0°C to water at 70.0°C is __________ kJ. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K, respectively. For H₂O, ΔH_fus = 6.01 kJ/mol, and ΔH_vap = 40.67 kJ/mol

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The predominant intermolecular force in AsH₃ is __________.

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In general, intramolecular forces determine the properties of a substance and intermolecular forces determine its properties.

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What types of intermolecular forces exist between NH₃ and CBr₄?

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Heat of sublimation can be approximated by adding together and .

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What type(s) of intermolecular forces exist between Br₂ and CCl₄?

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A gas is and assumes of its container whereas a liquid is and assumes of its container.

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