Phase changes

Front

What is a phase change?

Back

A phase change is a transition of matter from one state (solid, liquid, gas) to another due to the addition or removal of energy.

Front

What happens during freezing?

Back

During freezing, a liquid loses energy and its particles slow down, resulting in the formation of a solid.

Front

What is condensation?

Back

Condensation is the phase change from a gas to a liquid, occurring when gas particles lose energy and come together.

Front

What is the significance of energy in phase changes?

Back

Energy is required for phase changes; it is absorbed or released when a substance changes from one state to another.

Front

What occurs during melting?

Back

During melting, a solid gains energy, causing its particles to move more freely and transition into a liquid.

Front

What is boiling?

Back

Boiling is the rapid vaporization of a liquid that occurs when it is heated to its boiling point.

Front

What happens to particles during heating?

Back

When particles are heated, they gain energy, speed up, and move further apart.

Front

What is sublimation?

Back

Sublimation is the phase change from a solid directly to a gas without passing through the liquid state.

Front

What is the cooling curve?

Back

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

Front

What happens during condensation on a cooling surface?

Back

During condensation, water vapor loses energy and changes into liquid water on a cooler surface.