Question 1

Which of the following properties indicates the presence of weak intermolecular forces in a liquid?

Accepted Answer

A)  a high heat of vaporization
B)  a high critical temperature
C)  a high vapor pressure
D)  a high boiling point
E)  None of the above.F) A) and D)
G) A) and C)

Question 2

The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91°C. What is the vapor pressure of BBr3 at 20°C?

Accepted Answer

A)  11.5 torr
B)  311 torr
C)  5.31 torr
D)  143 torr
E)  66.1 torrF) A) and E)
G) B) and D)

Question 3

Given the following liquids and their boiling points, which has the highest vapor pressure at its normal boiling point?

Accepted Answer

A)  ethanol, bp = 78°C
B)  methanol, bp = 65°C
C)  water, bp = 100°C
D)  benzene, bp = 80°C
E)  The vapor pressure of each of the liquids at its normal boiling point would be the same.F) D) and E)
G) A) and E)

Question 4

Potassium crystallizes in a body-centered cubic lattice. How many atoms are there per unit cell?

Accepted Answer

A)  1
B)  2
C)  4
D)  6
E)  8F) B) and C)
G) A) and E)

Question 5

The molar heats of sublimation and fusion of iodine are 62.3 kJ/mol and15.3 kJ/mol, respectively. Calculate the molar heat of vaporization of liquid iodine.

Accepted Answer

A)  77.6 kJ/mol
B)  47.0 kJ/mol
C)  -47.0 kJ/mol
D)  -77.6 kJ/mol
E)  4.07 kJ/molF) A) and B)
G) A) and D)

Question 6

The molecular property related to the ease with which the electron density in a neutral atom or molecule can be distorted is called

Accepted Answer

A)  a dipole moment.
B)  polarizability.
C)  a dispersion force.
D)  surface tension.
E)  a van der Waals force.F) None of the above
G) A) and B)

Question 7

Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm3. Calculate the length of the edge of the unit cell in pm.

Accepted Answer

Question 8

Octane is a liquid component of gasoline. Given the following vapor pressures of octane at various temperatures, estimate the boiling point of octane in Leadville, Colorado, where the atmospheric pressure is 496 mmHg. 400 mmHg @ 104°C, 500 mmHg @ 111°C, 600 mmHg @ 117°C,
700 mmHg @ 122°C, 760 mmHg @ 125°C

Accepted Answer

A)  125°C
B)  120°C
C)  115°C
D)  110°C
E)  105°CF) A) and B)
G) C) and E)

Question 9

Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm3. What is the radius of the platinum atom?

Accepted Answer

A)  69 pm
B)  98 pm
C)  139 pm
D)  196 pm
E)  277 pmF) A) and B)
G) A) and E)

Question 10

Use the graph of vapor pressure to determine the normal boiling point of CHCl3. 3.   A) 19°C B) 52°C C) 60°C D) 64°C E) 70°C" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  19°C
B)  52°C
C)  60°C
D)  64°C
E)  70°CF) B) and D)
G) C) and E)

Question 11

Of the given pair of compounds, which would have the higher boiling point?
CH3Cl or CH4

Accepted Answer

Question 12

Which of the following liquids would have the highest viscosity at 25°C?

Accepted Answer

A)  CH3OCH3
B)  CH2Cl2
C)  C2H5OH
D)  CH3Br
E)  HOCH2CH2OHF) None of the above
G) A) and B)

Question 13

Which of the following substances would have the highest critical temperature?

Accepted Answer

A)  CH3Cl
B)  C2H6
C)  F2
D)  H2
E)  CO2F) A) and E)
G) D) and E)

Question 14

What phase exists at the point labeled a?

Accepted Answer

The answer of What phase exists at the point labeled...

Question 15

Which one of the following substances should exhibit hydrogen bonding in the liquid state?

Accepted Answer

A)  PH3
B)  H2
C)  H2S
D)  CH4
E)  NH3F) B) and C)
G) A) and B)

Question 16

The triple point of iodine is at 0.12 atm and 115°C. Thus, liquid I2

Accepted Answer

A)  is more dense than I2 (s) .
B)  cannot exist above 115°C.
C)  is liquid at room temperature.
D)  cannot have a vapor pressure less than 91 torr.E) B) and C)
F) A) and C)

Question 17

Find the temperature at which water boils on a day in the mountains when the barometric pressure is 593 mmHg. (Given: the heat of vaporization of water is 40.79 kJ/mol)

Accepted Answer

A)  93.1°C
B)  117°C
C)  41.5°C
D)  97.0°C
E)  68.1°CF) B) and D)
G) C) and D)

Question 18

Use the graph of vapor pressure to determine the normal boiling point of O2. 2.   A) 92 K B) 90 K C) 88 K D) 84 K E) O2 doesn't boil because it is always a gas." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  92 K
B)  90 K
C)  88 K
D)  84 K
E)  O2 doesn't boil because it is always a gas.F) A) and B)
G) A) and C)

Question 19

The structural form of the element Ge closely resembles the structure of

Accepted Answer

A)  C (diamond) .
B)  N (diatomic) .
C)  As (tetrahedral) .
D)  S (S8 ring) .
E)  Kr (monatomic) .F) A) and B)
G) A) and C)

Question 20

Given that the heat of vaporization of diethyl ether is 26.0 kJ/mol and the vapor pressure of diethyl ether is 440 torr at 20.°C, calculate the normal boiling point of diethyl ether.

Accepted Answer

36°C (the ...

Exam 12: Intermolecular Forces and Liquids and Solids

The structural form of the element Ge closely resembles the structure of

Correct Answer
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Which one of the following substances should exhibit hydrogen bonding in the liquid state?

Correct Answer
verified

Given that the heat of vaporization of diethyl ether is 26.0 kJ/mol and the vapor pressure of diethyl ether is 440 torr at 20.°C, calculate the normal boiling point of diethyl ether.

Correct Answer
verified
36°C (the ...
View Answer

Which of the following liquids would have the highest viscosity at 25°C?

Correct Answer
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The triple point of iodine is at 0.12 atm and 115°C. Thus, liquid I₂

Correct Answer
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Use the graph of vapor pressure to determine the normal boiling point of O₂.

Correct Answer
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Potassium crystallizes in a body-centered cubic lattice. How many atoms are there per unit cell?

Correct Answer
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Correct Answer
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Of the given pair of compounds, which would have the higher boiling point? CH₃Cl or CH₄

Correct Answer
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The molar heats of sublimation and fusion of iodine are 62.3 kJ/mol and15.3 kJ/mol, respectively. Calculate the molar heat of vaporization of liquid iodine.

Correct Answer
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The molecular property related to the ease with which the electron density in a neutral atom or molecule can be distorted is called

Correct Answer
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What phase exists at the point labeled a?

Correct Answer
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Which of the following properties indicates the presence of weak intermolecular forces in a liquid?

Correct Answer
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Use the graph of vapor pressure to determine the normal boiling point of CHCl₃.

Correct Answer
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Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm³. Calculate the length of the edge of the unit cell in pm.

Correct Answer
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Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm³. What is the radius of the platinum atom?

Correct Answer
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The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91°C. What is the vapor pressure of BBr₃ at 20°C?

Correct Answer
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Find the temperature at which water boils on a day in the mountains when the barometric pressure is 593 mmHg. (Given: the heat of vaporization of water is 40.79 kJ/mol)

Correct Answer
verified

Which of the following substances would have the highest critical temperature?

Correct Answer
verified

Given the following liquids and their boiling points, which has the highest vapor pressure at its normal boiling point?

Correct Answer
verified

Exam 12: Intermolecular Forces and Liquids and Solids

The structural form of the element Ge closely resembles the structure of

Correct AnswerverifiedShow Answer

Which one of the following substances should exhibit hydrogen bonding in the liquid state?

Correct AnswerverifiedShow Answer

Given that the heat of vaporization of diethyl ether is 26.0 kJ/mol and the vapor pressure of diethyl ether is 440 torr at 20.°C, calculate the normal boiling point of diethyl ether.

Correct Answerverified36°C (the ...View AnswerShow Answer

Which of the following liquids would have the highest viscosity at 25°C?

Correct AnswerverifiedShow Answer

The triple point of iodine is at 0.12 atm and 115°C. Thus, liquid I2

Correct AnswerverifiedShow Answer

Use the graph of vapor pressure to determine the normal boiling point of O2.

Correct AnswerverifiedShow Answer

Potassium crystallizes in a body-centered cubic lattice. How many atoms are there per unit cell?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Of the given pair of compounds, which would have the higher boiling point? CH3Cl or CH4

Correct AnswerverifiedShow Answer

The molar heats of sublimation and fusion of iodine are 62.3 kJ/mol and15.3 kJ/mol, respectively. Calculate the molar heat of vaporization of liquid iodine.

Correct AnswerverifiedShow Answer

The molecular property related to the ease with which the electron density in a neutral atom or molecule can be distorted is called

Correct AnswerverifiedShow Answer

What phase exists at the point labeled a?

Correct AnswerverifiedShow Answer

Which of the following properties indicates the presence of weak intermolecular forces in a liquid?

Correct AnswerverifiedShow Answer

Use the graph of vapor pressure to determine the normal boiling point of CHCl3.

Correct AnswerverifiedShow Answer

Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm3. Calculate the length of the edge of the unit cell in pm.

Correct AnswerverifiedShow Answer

Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm3. What is the radius of the platinum atom?

Correct AnswerverifiedShow Answer

The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91°C. What is the vapor pressure of BBr3 at 20°C?

Correct AnswerverifiedShow Answer

Find the temperature at which water boils on a day in the mountains when the barometric pressure is 593 mmHg. (Given: the heat of vaporization of water is 40.79 kJ/mol)

Correct AnswerverifiedShow Answer

Which of the following substances would have the highest critical temperature?

Correct AnswerverifiedShow Answer

Given the following liquids and their boiling points, which has the highest vapor pressure at its normal boiling point?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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36°C (the ...
View Answer

Correct Answer
verified

The triple point of iodine is at 0.12 atm and 115°C. Thus, liquid I₂

Correct Answer
verified

Use the graph of vapor pressure to determine the normal boiling point of O₂.

Correct Answer
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Correct Answer
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Correct Answer
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Of the given pair of compounds, which would have the higher boiling point? CH₃Cl or CH₄

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Use the graph of vapor pressure to determine the normal boiling point of CHCl₃.

Correct Answer
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Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm³. Calculate the length of the edge of the unit cell in pm.

Correct Answer
verified

Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm³. What is the radius of the platinum atom?

Correct Answer
verified

The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91°C. What is the vapor pressure of BBr₃ at 20°C?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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