#$Changes of State - Phase Changes - 2025

Change of State

the change of a substance from one state to another

Melting

change from a solid to a liquid; energy must be added

Freezing

change in state from a liquid to solid; energy must be removed

Boiling

change from a liquid to a gas throughout the liquid; bubbles are created within the liquid. Energy is added

Evaporation

the change from a liquid to a gas at the surface of the liquid; energy is added

Exothermic

a chemical or physical change in which energy is removed to slow the movement of particles;