Unit 2 | ES II | Phase Changes

Front

What happens to particles during phase changes?

Back

Particles do not change; they rearrange and their energy levels change.

Front

What is the freezing point of a substance?

Back

The moment at which particles no longer have energy to slide past each other.

Front

True or False: The evaporation point of a substance is the same as its condensation point.

Back

True.

Front

In which phase of matter is the attraction between particles the weakest?

Back

Gas.

Front

What do the RED sections of a phase diagram represent?

Back

Phase Changes.

Front

Define phase change.

Back

A transition of matter from one state to another, such as solid to liquid or liquid to gas.

Front

What is the boiling point of a substance?

Back

The temperature at which a liquid's vapor pressure equals the external pressure.

Front

What occurs during condensation?

Back

Gas particles lose energy and transition into a liquid state.

Front

What is sublimation?

Back

The process where a solid changes directly into a gas without becoming a liquid.

Front

What is the relationship between temperature and particle movement during phase changes?

Back

As temperature increases, particle movement increases, leading to phase changes.