Understanding Phase Changes

What does the kinetic theory of matter suggest about the behavior of particles in different states?

• Particles are larger in liquids than in solids.

• Particles are static in all states.

• Particles have the same energy in all states.

• Particles move more freely in gases than in solids.

How do particles in a liquid differ from those in a solid?

• They are more tightly packed.

• They are completely free from each other.

• They are more free to move around.

• They have no kinetic energy.

What is the term for the phase change from liquid to gas?

• Freezing

• Vaporization

• Sublimation

• Condensation

Which phase change involves going directly from a solid to a gas?

• Condensation

• Sublimation

• Deposition

• Fusion

During a phase change, what happens to the average kinetic energy of the particles?

• It becomes zero.

• It decreases.

• It remains constant.

• It increases.

Why is potential energy recorded as negative during phase changes?

• Because it is not measurable.

• Because energy is added to break bonds.

• Because it decreases with temperature.

• Because it is always zero.

What happens to the potential energy during vaporization?

• It decreases.

• It remains constant.

• It increases.

• It becomes zero.

At what point does a material change its phase?

• Only at its melting or boiling point.

• When energy is removed.

• At any temperature.

• When it is in a solid state.

How does the specific heat of water compare to that of ice?

• It is lower.

• It is higher.

• It is zero.

• It is the same.

Which phase of water has the highest specific heat?

• Ice

• Liquid water

• All have the same specific heat

• Steam