What are Phase Changes?
Phase changes happen when matter changes from one state to another due to heat energy being added or removed.
Energy Changes
- Adding heat: melting, evaporation, sublimation
- Removing heat: freezing, condensation, deposition
Main Phase Changes
Melting
Solid → Liquid (adding heat)
Ice cream melting
Freezing
Liquid → Solid (removing heat)
Water to ice
Evaporation
Liquid → Gas (adding heat)
Boiling water
Condensation
Gas → Liquid (removing heat)
Morning dew
Everyday Examples
Boiling Water
Liquid to gas
Ice Cubes
Liquid to solid