1.
predict what will happen when an ice cube is placed in a beaker

2. STATES OF MATTER

3. Three States of Matter
Gas
Liquid
Solid
Water Vapor
Water
Ice

4. Phases Changes
Solid to Liquid:
Liquid to Solid:
Melting
Freezing

5. Liquid to Gas:
Gas to Liquid:
Evaporation
Condensation

6. Sublimation (Deposition)
Gas to Solid:
Solid to Gas:
Sublimation (Deposition)
Frost
Sublimation
Dry Ice

7. Heat/Energy is lost
Heat/Energy is gained

8. Latent Heat
Energy required to change the phase of a substance, breaks the bonds of the substance between phases
Temperatures do not rise.
Latent means hidden

9. Properties of Water
ESRT Page 1
J = Joule, a unit of energy

10. Phase changes when energy is added/gained
Evaporation and Melting (2260 J/g) (334 J/g)
It takes a lot more energy to change phases between liquid and gas

11. Phase changes when energy is lost/released
Condensation and Freezing (2260 J/g) (334 J/g)
It takes a lot more energy to change phases between liquid and gas

12. How many joules of heat energy are required to evaporate 2 grams of water from a lake surface?
2g X 2260 J/g = 4520 J