1. Kinetic Molecular Theory

2. Kinetic Molecular Theory
So far we have considered “what happens,” but not “why.”
In science, “what” always comes before “why.”

3. Kinetic Molecular Theory
Assumptions:
Gas particles are in rapid motion, colliding with container walls.

4. Kinetic Molecular Theory

5. Kinetic Molecular Theory
Assumptions:
Gas particles have negligible size compared to the distances between them.

6. Kinetic Molecular Theory
Animation: Visualizing Molecular Motion (many molecules)

7. Kinetic Molecular Theory
Assumptions:
Gas particles have no attraction for one another.

8. Kinetic Molecular Theory
Assumptions:
Absolute temperature of the gas is a measure of the average kinetic energy of the gas particles.

9. Kinetic Molecular Theory
Animation: Kinetic Molecular Theory/Heat-Transfer

10. Molecular View of The Ideal Gas Law

11. React 5 Ne Ar
VNe = 2VAr
Which of the following best represents the mass ratio of Ne:Ar in the balloons?  
1:1
1:2
2:1
1:3
3:1

12. Video: Collapsing Can

13. React 6
On a beautiful autumn day in Champaign, IL, you are holding two balloons, each with 15 mol of gas.
Which balloon is larger?
The one filled with neon gas.
The one filled with argon gas.

14. React 6
On a beautiful autumn day in Champaign, IL, you are holding two balloons, each with 15 mol of gas.
Estimate the volume of each balloon.

15. VHe = VNe React 7 He 1 gram Ne What mass of neon is in the balloon?

16. VHe = VNe React 7 He 1 gram Ne
Determine the mass of neon in the balloon.