1. Ch and 14.2
Gas Laws

2. Gas Pressure Gas pressure = collisions
3 factors that affect gas pressure:

3. 1. Number of molecules
The more molecules = more (higher) pressure

4. 2. Temperature
Increase temperature increases Kinetic Energy which increases pressure (more collisions)

5. 3. Volume
Increase volume DECREASES pressure

6. Gas Laws (don’t copy, just read)
4 laws that compare Pressure, Temperature and Volume
3 of the laws only compare 2 at a time.
Boyle’s Law, Charles’s Law, Gay-Lussac’s Law
4th Law compares all 3 variables.
Combined Gas Law

7. Boyle’s Law
Pressure and Volume are inversely proportional. P1V1=P2V (temp is constant)
Increase pressure = decrease of volume

8. Charles’s Law
Temperature is directly proportional to volume. (pressure is constant)
V1 = V2
T1 T2
Increase temp = increase volume

9. Gay Lussac’s Law
Temperature is directly proportional to pressure. Increase Temp = increase Pressure (Volume is constant)

10. Combined Gas Law P1V1 = P2V2 T1 T2
Use this equation for all 4 Gas Law Problems. Cross off unneeded variables.
Temperature MUST be in KELVIN!!!!!!!!