1. Bell Ringer 2/26
At normal pressure, most chemical compounds and elements exist in which three states/phases of matter?
Which phase of matter exerts pressure on objects due to the collision of particles?
What is the main difference between boiling and evaporation?

2. Ch. 13.4
Phase Changes

3. Processes that decrease energy (exothermic):
Freezing: changing liquid to solid
Ex: Freezing Rain
Condensation: changing gas to liquid
Ex: Rain/water on the outside of a glass on a warm day
Deposition: changing gas directly to solid
Ex: Frost on the ground/Snow

4. Processes that Increase Energy (Endothermic)
Melting: turning solid to liquid
Ex: Snow melting on roads
Vaporization: turning liquid to gas
Ex: Steam rising from hot water/puddles evaporating
Sublimation: turning solid directly to gas
Ex: dry ice/loss of glaciers

5. Sublimation
Solid
Freezing
Deposition
Melting
Liquid
Gas
Vaporization
Condensation

6. Phase Diagram of Water
Normal Freezing Point
Normal Boiling Point

7. Phase Diagram of Water

8. Phase Diagram of Water