1. Section 3.2
Changes in Matter

2. Physical Changes Alter a substance without changing its composition
Cutting paper
Crumbling foil
Changes in the state of matter are physical changes!!
Only appearance was altered!

3. Condensation

4. Chemical Changes
Process in which one or more substances change into new substances
Also known as a chemical reaction
Examples:
Rusting
Fermenting

5. Chemical Change

6. Five Indicators of Chemical Reactions
1. Change in Odor
2. Change in Color
3. Solid/liquid Precipitate is Formed
4. Gas Formed
5. Release/Absorption of energy (heat)

7. Odor Change

8. Color Change

9. Liquid Precipitate

10. Energy Released

11. Gas Formed

12. Conservation of Mass
Mass in neither created nor destroyed during a chemical reaction
Mass is always conserved
This is a law!!!

13. Mass of Reactants = Mass of Products