P.2 Phase Change Pre-Unit Test 2024-25

Front

What is the process called when liquid water changes to an ice cube?

Back

Freezing

Front

What happens to molecular attraction when energy is transferred out of a substance?

Back

Molecular attraction overcomes kinetic energy, causing molecules to have less freedom of movement.

Front

Describe the freedom of movement of molecules in a liquid compared to a gas.

Back

In a liquid, molecules move around each other; in a gas, they move away from each other.

Front

What is the term for the pull between two molecules that remains constant for a substance?

Back

Molecular Attraction

Front

How does higher pressure affect phase changes?

Back

Higher pressure makes it easier for a phase change to a lower level (gas -> liquid -> solid).

Front

What is the phase change from solid to liquid called?

Back

Melting

Front

What is the phase change from gas to liquid called?

Back

Condensation

Front

What is the phase change from liquid to gas called?

Back

Vaporization

Front

What is the term for the energy required to change a substance from solid to liquid at its melting point?

Back

Heat of fusion

Front

What is the term for the energy required to change a substance from liquid to gas at its boiling point?

Back

Heat of vaporization