Phase Changes - Phase Diagrams

Front

What are the states of matter?

Back

The states of matter are solid, liquid, gas, and plasma.

Front

Define phase change.

Back

A phase change is the transformation of a substance from one state of matter to another, such as melting, freezing, or boiling.

Front

What is a phase diagram?

Back

A phase diagram is a graphical representation that shows the phases of a substance at different temperatures and pressures.

Front

What is the normal melting point?

Back

The normal melting point is the temperature at which a solid becomes a liquid at 1 atmosphere of pressure.

Front

What is the normal boiling point?

Back

The normal boiling point is the temperature at which a liquid becomes a gas at 1 atmosphere of pressure.

Front

What happens during sublimation?

Back

Sublimation is the process where a solid turns directly into a gas without passing through the liquid state.

Front

What is deposition in terms of phase changes?

Back

Deposition is the process where a gas turns directly into a solid without becoming a liquid first.

Front

What occurs when pressure is increased on a substance at its melting point?

Back

Increasing pressure can cause a substance to remain solid or even become a liquid, depending on the substance.

Front

What is the critical point in a phase diagram?

Back

The critical point is the temperature and pressure at which the liquid and gas phases of a substance become indistinguishable.

Front

What is supercritical fluid?

Back

A supercritical fluid is a state of matter that occurs when a substance is above its critical temperature and pressure, exhibiting properties of both liquid and gas.