change in temperature

What happens to the temperature of a substance during a phase change (e.g., from solid to liquid)?

• The temperature increases steadily.

• The temperature decreases.

• The temperature stays the same.

• The temperature rises and falls continuously.

Which of the following phase changes involves the absorption of energy?

• Freezing

• Condensation

• Evaporation

• Deposition

What term describes the phase change from a solid directly to a gas without passing through the liquid phase?

• Freezing

• Melting

• Sublimation

• Deposition

Which phase change occurs when water vapor turns into liquid water?

• Sublimation

• Melting

• Condensation

• Deposition

When a solid melts into a liquid, what happens to the movement of its particles?

• The particles stop moving.

• The particles move more slowly.

• The particles move faster and can slide past each other.

• The particles are fixed in place.

Which phase change releases energy to the surroundings?

• Melting

• Evaporation

• Freezing

• Sublimation

At what temperature does water freeze at constant pressure?

• 0°C

• 50°C

• 100°C

• -10°C

What is the reason that phase changes occur?

• The mass of the substance changes.

• The size of the particles changes.

• The energy of the particles changes.

• The chemical composition of the substance changes.

What happens to most substances when they are heated?

• They contract and take up less space.

• They expand and take up more space.

• They remain the same size.

• They change state immediately.

What is thermal contraction?

• The process of a solid turning into a liquid.

• The decrease in size of a material as it cools.

• The increase in size of a material as it heats up.

• The release of energy during a chemical reaction.