Ch. 14.1 and 14.2 Gas Laws

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

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

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

3. Volume Increase volume DECREASES pressure

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

Boyle’s Law Pressure and Volume are inversely proportional. P1V1=P2V2 (temp is constant) Increase pressure = decrease of volume

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

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

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!!!!!!!!