Front

What is a phase change?

Back

A phase change is a transition of matter from one state (solid, liquid, gas) to another, typically involving energy changes.

Front

What are the three main states of matter?

Back

The three main states of matter are solid, liquid, and gas.

Front

What is the process of melting?

Back

Melting is the phase change from solid to liquid, occurring when a substance absorbs heat.

Front

What is the process of freezing?

Back

Freezing is the phase change from liquid to solid, occurring when a substance loses heat.

Front

What is vaporization?

Back

Vaporization is the phase change from liquid to gas, which can occur through boiling or evaporation.

Front

What is condensation?

Back

Condensation is the phase change from gas to liquid, occurring when a gas loses heat.

Front

What happens to particle movement during melting?

Back

During melting, the particles in a solid gain energy and begin to move more freely, transitioning to a liquid state.

Front

What happens to particle movement during freezing?

Back

During freezing, the particles in a liquid lose energy and move closer together, forming a solid.

Front

What is a cooling curve?

Back

A cooling curve is a graph that shows the change in temperature of a substance as it cools and undergoes phase changes.

Front

What is the significance of line segments on a phase change graph?

Back

Line segments on a phase change graph represent phase changes, while flat sections indicate temperature changes at constant phase.