change of state
A change of state is a change that takes place when matter turns from one physical state (gas, liquid, or solid) into another. Typical changes of state are evaporation and condensation, sublimation, boiling, and melting and solidification. Changes of state always involve the absorption or release of heat energy. But because of the phenomenon of latent heat, a change in temperature does not necessarily accompany a change of state.
Related categories STATES OF MATTER
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