Phase Changes & Properties of Matter

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 changes in energy and temperature.

Front

What are the three main states of matter?

Back

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

Front

What happens to the energy of particles during melting?

Back

During melting, energy is added to the particles, causing them to move more freely and transition from a solid to a liquid.

Front

What is condensation?

Back

Condensation is the phase change where a gas turns into a liquid as energy is removed.

Front

What is boiling (vaporization)?

Back

Boiling (vaporization) is the phase change where a liquid turns into a gas as energy is added.

Front

How does temperature affect particle motion?

Back

As temperature increases, particle motion (kinetic energy) increases; as temperature decreases, particle motion decreases.

Front

What is freezing?

Back

Freezing is the phase change where a liquid turns into a solid as energy is removed.

Front

What is the melting point?

Back

The melting point is the temperature at which a solid becomes a liquid.

Front

What is the boiling point?

Back

The boiling point is the temperature at which a liquid becomes a gas.

Front

What occurs at the melting point of a substance?

Back

At the melting point, the solid and liquid phases coexist in equilibrium.