Quiz on Energy Changes and Phase Changes

What is the process called when a solid turns into a liquid?

• Freezing

• Melting

• Condensation

• Sublimation

Which phase of matter has the most molecular order?

• Solid

• Plasma

• Liquid

• Gas

What is the term for the amount of heat needed to melt a substance?

• Enthalpy of reaction

• Specific heat

• Heat of fusion

• Heat of vaporization

In which process is energy absorbed?

• Melting

• Deposition

• Freezing

• Condensation

What happens to molecular order when water evaporates?

• Remains the same

• Decreases

• Becomes chaotic

• Increases

What is the change in enthalpy (ΔH) for an endothermic process?

• Always negative

• Varies with temperature

• Always positive

• Zero

What is the boiling point of water?

• 0 °C

• 25 °C

• 100 °C

• 50 °C

Which of the following is an exothermic process?

• Melting

• Evaporation

• Sublimation

• Condensation

What is the specific heat of liquid water?

• 2.11 J/(g·°C)

• 1.00 J/(g·°C)

• 2.00 J/(g·°C)

• 4.186 J/(g·°C)

What is the process called when a gas turns into a solid?

• Freezing

• Deposition

• Condensation

• Sublimation