1. WARM UP
If 3.5 moles of CH4 gas occupy 2.33 L at 15°C, what new volume will be obtained if 2.0 moles of gas are added and the temperature is increased to 75°C?

2. Kinetic Molecular Theory
Chemistry II

3. Basic Ideas
Properties of gases explained by motion of individual molecules
James Clerk Maxwell

4. Basic Ideas Gas molecules: are far apart
have mass but negligible volume
are in constant, random motion
frequently, elastically collide
do not exert intermolecular forces
have kinetic energy proportional to temperature and mass

5. Applications to Properties
Compressibility
Large distances between molecules

6. Applications to Gas Laws
Boyle’s Law
Smaller volume means more collisions, more push against container
Charles’s Law
Higher temp raises molecular speed, which means more and stronger push and greater volume

7. Applications to Gas Laws
Avogadro’s Law
More molecules, more collisions, greater volume
Dalton’s Law
No IMF’s means each gas has no effect on any other

8. WRAP UP
Explain how Boyle’s, Charles’, and Avogadro’s Laws are all related to collisions?
Why is kinetic-molecular theory used to describe gas collisions?

9. WARM UP
List 3 characteristics of gases indicated by Clerk-Maxwell’s kinetic-molecular theory.