1. States of Matter
Chemistry Unit 5

2. Four states of matter Solids Liquids Gases Plasma
Kinetic energy determines which state element or compound is in

3. Kinetic energy Energy of motion
What does this have to do with particles?
Average kinetic energy = temperature

4. Particles This unit is all about particles
Particles are the smallest unit of matter
Particles have kinetic energy
When a fast particle collides with a slow particle, what happens to the motion of both particles?
The particles exchange energy and become the same speed after the collision (the fast slows down and the slow speeds up)

5. Gas Motion is constant and random No fixed shape or volume
Motion is elastic
What do these things have to do with smell?
Pressure: results from force of gas
Barometer measures Pascals (Pa) or atm

6. Behavior of gases
Compressability: measure of how much volume decreases under pressure
Gases are easily compressed because of space between particles
Amount of gas, temperature and volume affect gas pressure

7. Liquids No fixed shape, has fixed volume
Vaporization: liquid to gas when boiling
Evaporation: liquid to gas when not boiling
Condensation: vapor to liquid
What is a boiling point?
What does it have to do with kinetic energy?

8. Solid Fixed shape and volume
Sublimation: change from solid to vapor (dry ice)
What is a melting point?
What does it have to do with kinetic energy?

9. Phase Changes

10. Particulate Model

11. Quiz Name the four states of matter.
Which state has the most packed particles?
Which state has the least packed particles?
What does kinetic energy mean?
What is another term for average kinetic energy?
What happens to a fast and a slow particle after they collide?