1. PHASE CHANGES Each state of matter is called a PHASE

2. Phase change:
The REVERSIBLE, physical change that occurs when a substance changes from one STATE to another.

3. Temperature and Phase Change
The temperature of a substance does NOT CHANGE during a phase change.

4. Energy and Phase Change
Energy is either ABSORBED or released during a phase change.

5. Endothermic
Energy ABSORBED (energy IN)

6. Exothermic
Energy RELEASED (energy OUT)

7. MELTING Solid to liquid

8. VAPORIZATION Liquid to Gas
Boiling Evaporation

9. FREEZING Liquid to Solid

10. CONDENSATION Gas to Liquid

11. SUBLIMATION Solid to Gas

12. DEPOSITION Gas to Solid