Question 1

Which statement best describes vapor pressure?

Accepted Answer

Vapor pressure is the pressure exerted by a gas in equilibrium with its liquid at a given temperature.

Question 2

What happens to the vapor pressure of a liquid as temperature increases?

Accepted Answer

Vapor pressure increases because more molecules have enough energy to escape into the gas phase.

Question 3

Which of the following best explains why volatile liquids have high vapor pressures?

Accepted Answer

They have weak intermolecular forces, allowing more molecules to escape into the vapor phase.

Question 4

Which process is endothermic and requires energy input?

Accepted Answer

Vaporization

Question 5

If the rate of evaporation equals the rate of condensation in a closed container, what is the system said to be in?

Accepted Answer

Dynamic equilibrium

Question 6

Which of the following will increase the rate of evaporation of a liquid?

Accepted Answer

Increasing the temperature of the liquid

Question 7

Why does the temperature of a liquid decrease as it vaporizes?

Accepted Answer

Because high-energy molecules leave the liquid, lowering the average energy of the remaining molecules

Question 8

Which of the following statements about condensation is correct?

Accepted Answer

Condensation releases energy to the surroundings.

Question 9

A liquid with strong intermolecular forces will have which of the following properties?

Accepted Answer

Low vapor pressure and high boiling point

Question 10

Which of the following best describes the relationship between surface area and the rate of evaporation?

Accepted Answer

Increasing surface area increases the rate of evaporation.

Question 11

Which of the following is true regarding the distribution of thermal energy in a liquid?

Accepted Answer

A small fraction of molecules have enough energy to escape into the gas phase.

Question 12

Which of the following will result in a higher rate of vaporization?

Accepted Answer

Increasing temperature and decreasing intermolecular forces

Question 13

Which statement correctly compares vaporization and condensation?

Accepted Answer

Vaporization is endothermic, while condensation is exothermic.

Question 14

A sample of water is placed in a closed container. What will happen over time?

Accepted Answer

The rates of evaporation and condensation will eventually become equal, establishing equilibrium.

Question 15

Which of the following is a consequence of increasing the temperature of a liquid?

Accepted Answer

The rate of evaporation increases.

Question 16

Which of the following best describes a volatile liquid?

Accepted Answer

A liquid that evaporates easily due to weak intermolecular forces.

Question 17

Which of the following is NOT a factor that increases the rate of vaporization?

Accepted Answer

Increasing the strength of intermolecular forces

Question 18

Which of the following statements is true regarding the energy changes during vaporization?

Accepted Answer

The process requires energy input to overcome intermolecular forces.

Question 19

Which of the following best explains why condensation is an exothermic process?

Accepted Answer

Energy is released as molecules lose energy and form intermolecular attractions.

Question 20

Which of the following would result in a liquid with a low vapor pressure?

Accepted Answer

Strong intermolecular forces

Lecture Slides Chapter 11

Study Guide - Practice Questions