1. Phases of Matter

2. Solids: Phases of Matter particles: tightly packed in orderly pattern
particles can’t move very much

3. Gases:
Particles: far apart
can move rapidly from place to place

4. Liquids:
are in between solids & gases

5. Why do liquids & solids exist?
What holds them together?

6. Kinetic Energy Atoms & molecules are in constant motion
Temperature = measure of average KE of particles in sample of matter

7. If temperature ↑,
the average KE↑
If temperature ,
then average KE 

8. Temperature vs. Phase
gas & solid at same temp have same average KE
but particles in these 2 phases
move very differently

9. Types of motion Gases can move from place to place they can tumble
they can shake

10. Solids can only vibrate
in a back and forth motion

11. Liquids can vibrate but have very hindered movement moving place to place or tumbling
the particles can move a little bit but
they bump into neighbors

12. What is a phase change? A transition between phases There are 6
What are they?

13. 1. solidification l → s
2. melting s → l
3. evaporation l → g
4. condensation g → l
5. sublimation s → g
6. deposition g → s

14. Melting solid →liquid

15. source
Boiling liquid →gas

16. Deposition gas→solid

17. Condensation gas→liquid

18. Sublimation gas→solid
Freezing liquid→solid
source

19. Phase Changes
When a substance goes from the gas to a condensed phase (s or l), what happens?
The particles get closer together and their motion slows down

20. Phase Changes
When a substance goes from a solid to a liquid or a gas, what happens?
The particles move farther apart and their motion increases