1. Combined Gas Law and Dalton’s Partial Pressure Law
Chapter 12

2. The Combined Gas Law
It combines the previous three laws in the following mathematical expression:
P1 x V P2 x V2 =
T T2

3. Sample Problem
The volume of a gas filled balloon is L at C and 153 kPa pressure . What volume will the balloon have at standard temperature and pressure?

4. Dalton’s Law of Partial Pressure
The pressure exerted by a gas in a mixture is unaffected by the presence of the other gases.
The total pressure of gases is the sum of the partial pressures of its components.

5. Dalton’s Law
The mathematical expression is
Pt = P1 + P2 + P3 + ……

6. Sample Problem
A gas mixture containing oxygen, nitrogen, and carbon dioxide has a total pressure of kPa. If PO2 = 6.6 kPa and PN2 = 23.0 kPa, What is PCO2?