1. Phase changes! 11/11/15

2. Changes of State

3. SOLID LIQUID GAS PLASMA Tightly packed, in a regular pattern Vibrate, but do not move from place to place Close together with no regular arrangement. Vibrate, move about, and slide past each other Well separated with no regular arrangement. Vibrate and move freely at high speeds Has no definite volume or shape and is composed of electrical charged particles

4. Changes of State If pressure doesn’t change

5. Changes of State Changes that create disorganization absorb energy: melting, vaporizing, subliming Changes that create order release energy: freezing, condensing, depositing

6. Changes of State If pressure and temp change

7. Changes of State Phase Diagrams Points –Triple point  temp & pressure at which all three phases can coexist –Critical points (temp & pressure): point were liquid and gas become indistinguishable –Normal freezing/melting point: temperature at 1atm where solid and liquid meet –Normal boiling point: temp at 1 atm where gas and liquid meet