1. Describe the SHAPE and VOLUME for the 4 states of matter (plasma, gas, liquid, solid).
Rank them from LOW to HIGH kinetic energy!
Warm-Up 2/20/14

2. Gas Properties and Behaviors
Thursday 2/20/14

3. Kinetic Molecular Theory
Explains the behavior of matter (including gases)
Has mass
Constant, random, rapid motion
Gas particles are VERY far apart
Gas particles may collide, but are not attracted or repelled
Kinetic Molecular Theory

4. “Elastic” Collisions

5. KMT describes the behavior of “IDEAL” gases that have no volume, attractions, and do not lose energy.
A good estimate for the behavior of REAL gases…but not perfect!
Real vs. Ideal

6. Pressure: the force of the gas atoms or molecules running into the wall of the their container.
Keeps things (like balloons!) inflated.
Gas Pressure

7. “Atmospheric Pressure” keeps balloons from getting bigger.
Inward pressure caused by gas in the atmosphere on the balloon’s surface!

8. Changing Pressure Adding more or less gas particles
Changing the temperature
Changing the size of the container
Changing Pressure

9. Diffusion and Effusion
Diffusion: the speed with which gas particles move across a space.
Effusion: the speed with which gas particles escape through a tiny hole in a container.
LARGER PARTICLES = MOVE SLOWER
Diffusion and Effusion

11. Your Job Complete the gas behavior questions.
They will be checked tomorrow
Unit 7 Test Retakes available starting Monday!
Your Job