2. Gas LawsGas Laws  Describes the relationship between variables associated with gases  Volume (V)  Temperature (T)  Pressure (P)  Concentration/amount of gas (n) **Two variables change in relation to each other while the remaining variables are held constant.

3. Gas LawsGas Laws 1)Boyle’s Law 2)Charle’s Law 3)Gay-Lussac Law 4)Avagadro’s Law 5)Combined Gas Law 6)Ideal Gas Law

4. Boyle’s LawBoyle’s Law  Pressure is INVERSELY proportional to the volume of the gas.  Temperature and particle amount constant  P , V   P , V   Pressure and volume relationship  P 1 V 1 = P 2 V 2  Remember to keep units the same.

5. Example 1Example 1 What would happen to the volume of a balloon filled with 0.357 L of H 2 gas collected at 741.3 mmHg if the atmospheric pressure increased to 758.1 mmHg? (temperature is constant)

6. Example 2:Example 2:  What is the volume of a scuba tank if it takes 2000L of air collected at 1atm to fill the tank to a pressure of 150 atm? Temperature is constant

7. Example 3:Example 3:  Calculate the volume of a balloon that could be filled at 1.00 atm with helium in a 2.50L compressed gas cylinder in which the pressure is 200 atm at 25°C.

8. Charle’s LawCharle’s Law  Temperature and volume relationship  The volume of a gas is DIRECTLY proportional to the temperature  T , V   T , V   V 1 = V 2 SOOO T 1 = T 2  T 1 V 2 = T 2 V 1  Remember to keep units the same. Temperature MUST be in Kelvin

9. Example 1:Example 1: A sample of O 2 gas with a volume of 0.357L was collected at 21°C. Calculate the volume of the gas when it is cooled to 0°C if the pressure remains constant.

10. Example 2:Example 2:  How hot will a 2.3L balloon have to get to expand to a volume of 400L? Assume the initial balloon temperature is 25°C.

11. Homework  Study for Kinetics Quiz.