1. Adv: Announcements Turn in Review, Take Quest
After Quest: Phase Changes Review and Phase Diagrams
SOL Review Packet and Two 40 Question J-Labs due by day of SOL: THURS 5/19

2. exothermic: release heat
Endothermic: require heat
boiling
condensation
sublimation
deposition
melting
freezing

3. 3. Intermolecular Forces
Forces of attraction between molecules
(dotted lines represents attraction between molecules)

4. Intermolecular Forces & Phase of Matter
For the same chemical substance, molecules in the SOLID phase will have stronger intermolecular forces between them than molecules in the GAS phase
In order for a solid to change into a liquid (melt) or for a liquid to change into a gas (boil), the molecules must overcome the intermolecular forces holding them together.

5. Phase Diagram I.S.