As the intermolecular forces of a liquid decrease, the vapor pressure will ___.

• Increase
• Decrease
• Stay the same
• I don't know

Which state of matter do the particles have the least amount of kinetic energy?

• Gas
• Liquid
• Solid
• Plasma

The temperature at which a substance actively changes from liquid to gas is the:

• Boiling point
• Evaporation point
• Condensation point
• Freezing point

The normal boiling point of a liquid is the temperature at which a substance boils when the atmospheric pressure is equal to ___.

• Kelvin
• Vapor pressure
• Celsius
• Standard pressure

The force exerted by particles in a closed container. It occurs above a liquid.

• Boiling pressure
• Vapor pressure
• Standard pressure
• Air pressure

What term describes the point at which the rates of evaporation and condensation are equal in a closed system?

• Saturation
• Equilibrium
• Freezing point
• Boiling point

Why is evaporation considered a cooling process?

• Because it increases the temperature of the remaining liquid.
• Because faster-moving (higher energy) particles escape, lowering the average energy of those left behind.
• Because it adds heat to the surrounding air.
• Because it condenses vapor into liquid.

Which of the following best describes the motion of particles in a liquid according to the kinetic theory?

• Particles are tightly packed and do not move.
• Particles slide past each other and stay close due to intermolecular forces.
• Particles move freely without any attractions.
• Particles vibrate in fixed positions.

Why do liquids evaporate even below their boiling point?

• Because they are boiling slowly.
• Because all particles in a liquid have the same kinetic energy.
• Because some surface particles have enough energy to overcome intermolecular forces.
• Because pressure forces them to evaporate.

What happens to the average kinetic energy of a liquid as evaporation occurs?

• It decreases.
• It stays the same.
• It increases.
• It fluctuates randomly.