Question 1

Which of the following best describes the relationship of molecules in a liquid with those in a gas at the same temperature?

Accepted Answer

A)  Molecules in the liquid are much closer together than those in the gas. 
B)  Molecules in the liquid have less kinetic energy than those in the gas. 
C)  Molecules in the liquid are much closer together than those in the gas and have less kinetic energy than those in the gas. 
D)  None of these are true. 
A)  Molecules in the liquid are much closer together than those in the gas. 
B)  Molecules in the liquid have less kinetic energy than those in the gas. 
C)  Molecules in the liquid are much closer together than those in the gas and have less kinetic energy than those in the gas. 
D)  None of these are true. C

Question 2

Which of the following relates to the term "vapor pressure of a liquid"?

Accepted Answer

A)  the pressure exerted by a liquid on the walls of a container 
B)  the partial pressure exerted by a gas in equilibrium with its liquid form in a closed system 
C)  the pressure exerted by a liquid on the walls of a container and the partial pressure exerted by a gas in equilibrium with its liquid in a closed system 
D)  none of these are true 
A)  the pressure exerted by a liquid on the walls of a container 
B)  the partial pressure exerted by a gas in equilibrium with its liquid form in a closed system 
C)  the pressure exerted by a liquid on the walls of a container and the partial pressure exerted by a gas in equilibrium with its liquid in a closed system 
D)  none of these are true B

Question 3

When the state of a substance changes from A to B as represented by the given models, which of the following statements is true?

Accepted Answer

A)  The velocity of the molecules increases. 
B)  The strength of the intermolecular forces increases. 
C)  The kinetic energy of the molecules decreases. 
D)  The strength of the intermolecular force increases and the kinetic energy of the molecules decreases. 
A)  The velocity of the molecules increases. 
B)  The strength of the intermolecular forces increases. 
C)  The kinetic energy of the molecules decreases. 
D)  The strength of the intermolecular force increases and the kinetic energy of the molecules decreases. C

Question 4

Which of the following is the strongest intermolecular interaction?

Accepted Answer

A)  Covalent bonding 
B)  Dipole-dipole interactions 
C)  London dispersion forces 
D)  Hydrogen bonding 
A)  Covalent bonding 
B)  Dipole-dipole interactions 
C)  London dispersion forces 
D)  Hydrogen bonding

Question 5

Which of the following is a mathematical representation of the combined gas law?

Accepted Answer

A)  P1V2T1 = P2V1T2 
B)  P1V2T2 = P2V1T1 
C)  P1V1T2 = P2V2T1 
D)  P1V1T1 = P2V2T2 
A)  P1V2T1 = P2V1T2 
B)  P1V2T2 = P2V1T1 
C)  P1V1T2 = P2V2T1 
D)  P1V1T1 = P2V2T2

Question 6

The normal boiling point of acetic acid is 117.9°C. Which of the following is true?

Accepted Answer

A)  The vapor pressure of acetic acid at 100°C is greater than 760 torr. 
B)  The vapor pressure of acetic acid at 100°C is equal to 760 torr. 
C)  The vapor pressure of acetic acid at 100°C is less than 760 torr. 
D)  There is insufficient information to answer the question. 
A)  The vapor pressure of acetic acid at 100°C is greater than 760 torr. 
B)  The vapor pressure of acetic acid at 100°C is equal to 760 torr. 
C)  The vapor pressure of acetic acid at 100°C is less than 760 torr. 
D)  There is insufficient information to answer the question.

Question 7

Which of the following is a mathematical representation of Charles's law?

Accepted Answer

A)  P1V2 = P2V1 
B)  P1V1 = P2V2 
C)  V1T2 = V2T1 
D)  V1T1 = V2T2 
A)  P1V2 = P2V1 
B)  P1V1 = P2V2 
C)  V1T2 = V2T1 
D)  V1T1 = V2T2

Question 8

Identify the correct statement.

Accepted Answer

A)  Liquids can be easily compressed. 
B)  Liquids have many large empty spaces between their molecules. 
C)  The density of a liquid is much greater than that of a gas. 
D)  When the distance between molecules increases, gas condenses to a liquid. 
A)  Liquids can be easily compressed. 
B)  Liquids have many large empty spaces between their molecules. 
C)  The density of a liquid is much greater than that of a gas. 
D)  When the distance between molecules increases, gas condenses to a liquid.

Question 9

An unknown amount of He gas occupies 30.5 L at 2.00 atm pressure and 300 K. Calculate the weight of the gas in the container.

Accepted Answer

A)  2.48 g 
B)  4.95 g 
C)  9.91 g 
D)  19.8 g 
A)  2.48 g 
B)  4.95 g 
C)  9.91 g 
D)  19.8 g

Question 10

At constant pressure, the temperature of a 4.00 L sample of gas is increased from 300 K to 400 K. Calculate the new volume of the gas sample.

Accepted Answer

A)  0.188 L 
B)  0.300 L 
C)  3.33 L 
D)  5.33 L 
A)  0.188 L 
B)  0.300 L 
C)  3.33 L 
D)  5.33 L

Question 11

What is the average pressure of the atmosphere at sea level?

Accepted Answer

A)  760 mm Hg 
B)  35.92 in. Hg 
C)  780 torr 
D)  760 bars 
A)  760 mm Hg 
B)  35.92 in. Hg 
C)  780 torr 
D)  760 bars

Question 12

Which of the following leads to an increase in the kinetic energy of a molecule?

Accepted Answer

A)  an increase in surface area 
B)  an increase in temperature 
C)  an increase in density 
D)  an increase in intermolecular attractive forces 
A)  an increase in surface area 
B)  an increase in temperature 
C)  an increase in density 
D)  an increase in intermolecular attractive forces

Question 13

Suppose a balloon is filled so that its volume is 2.00 L when the pressure is 1.10 atm and the temperature is 300 K. What is the volume of the balloon when it rises to an elevation where the pressure is 418 mm Hg and the temperature is 200 K?

Accepted Answer

A)  3.30 L 
B)  2.67 L 
C)  0.375 L 
D)  0.303 L 
A)  3.30 L 
B)  2.67 L 
C)  0.375 L 
D)  0.303 L

Question 14

Chloroform has a normal boiling point of 61.7°C. Which of the following is true?

Accepted Answer

A)  At any temperature, the vapor pressure of chloroform is less than that of water. 
B)  Chloroform is more volatile than water. 
C)  At any temperature, the vapor pressure of chloroform is less than that of water, and chloroform is more volatile than water. 
D)  None of these is true. 
A)  At any temperature, the vapor pressure of chloroform is less than that of water. 
B)  Chloroform is more volatile than water. 
C)  At any temperature, the vapor pressure of chloroform is less than that of water, and chloroform is more volatile than water. 
D)  None of these is true.

Question 15

Which of the following is a mathematical representation of the ideal gas law?

Accepted Answer

A)  PVRT = n 
B)  PV/RT = n 
C)  VRT/P = n 
D)  n = RT/PV 
A)  PVRT = n 
B)  PV/RT = n 
C)  VRT/P = n 
D)  n = RT/PV

Question 16

Which of the following is a mathematical representation of Boyle's law?

Accepted Answer

A)  P1/V2 = P2/V1 
B)  P1/V1 = P2/V2 
C)  P1/T2 = P2/T1 
D)  P1/T1 = P2/T2 
A)  P1/V2 = P2/V1 
B)  P1/V1 = P2/V2 
C)  P1/T2 = P2/T1 
D)  P1/T1 = P2/T2

Question 17

Which of the following units can be used to measure air pressure?

Accepted Answer

A)  atmospheres 
B)  millimeters of Hg 
C)  torr 
D)  all of these 
A)  atmospheres 
B)  millimeters of Hg 
C)  torr 
D)  all of these

Question 18

Which of the following is a mathematical representation of Gay-Lussac's law?

Accepted Answer

A)  P1V2 = P2V1 
B)  P1V1 = P2V2 
C)  P1T2 = P2T1 
D)  P1T1 = P2T2 
A)  P1V2 = P2V1 
B)  P1V1 = P2V2 
C)  P1T2 = P2T1 
D)  P1T1 = P2T2

Question 19

Which of the following are measures of standard temperature and pressure?

Accepted Answer

A)  0°C and 1 atm 
B)  32°F and 1 atm 
C)  273 K and 1 atm 
D)  all of these 
A)  0°C and 1 atm 
B)  32°F and 1 atm 
C)  273 K and 1 atm 
D)  all of these

Question 20

At constant pressure, the temperature of a 4.0 L sample of gas is decreased from 50°C to 25°C. Calculate the new volume of the gas sample.

Accepted Answer

A)  2.00 L 
B)  3.69 L 
C)  4.34 L 
D)  8.00 L 
A)  2.00 L 
B)  3.69 L 
C)  4.34 L 
D)  8.00 L

Exam 5: Gases, Liquids, and Solids

Which of the following best describes the relationship of molecules in a liquid with those in a gas at the same temperature?

Which of the following relates to the term "vapor pressure of a liquid"?

When the state of a substance changes from A to B as represented by the given models, which of the following statements is true?

Which of the following is the strongest intermolecular interaction?

Which of the following is a mathematical representation of the combined gas law?

The normal boiling point of acetic acid is 117.9°C. Which of the following is true?

Which of the following is a mathematical representation of Charles's law?

Identify the correct statement.

An unknown amount of He gas occupies 30.5 L at 2.00 atm pressure and 300 K. Calculate the weight of the gas in the container.

At constant pressure, the temperature of a 4.00 L sample of gas is increased from 300 K to 400 K. Calculate the new volume of the gas sample.

What is the average pressure of the atmosphere at sea level?

Which of the following leads to an increase in the kinetic energy of a molecule?

Suppose a balloon is filled so that its volume is 2.00 L when the pressure is 1.10 atm and the temperature is 300 K. What is the volume of the balloon when it rises to an elevation where the pressure is 418 mm Hg and the temperature is 200 K?

Chloroform has a normal boiling point of 61.7°C. Which of the following is true?

Which of the following is a mathematical representation of the ideal gas law?

Which of the following is a mathematical representation of Boyle's law?

Which of the following units can be used to measure air pressure?

Which of the following is a mathematical representation of Gay-Lussac's law?

Which of the following are measures of standard temperature and pressure?

At constant pressure, the temperature of a 4.0 L sample of gas is decreased from 50°C to 25°C. Calculate the new volume of the gas sample.

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