1. Chapter 3 Sec. 2 The Gas Laws

2. Force distributed over an area (Newton / meter 2 ) Units: N/m 2 or Pascal (Pa) More collisions and greater speed of gas molecules increases pressure Pressure

3. Factors that Affect Gas Pressure Temperature  Increase of temp  Increase of K.E.  Increase K.E. increases the pressure Volume  Reducing the volume of a container increases the pressure

4. Factors that Affect Gas Pressure Number of Particles  Increase number of Particles  Increase Pressure  Why do you put more air in your tires in the winter?

5. Boyle’s Law The volume of a fixed amount of gas varies inversely with pressure of the gas. P 1 V 1 = P 2 V 2 Boyle’s Law PressureVolume

6. Charles’s Law The volume of a gas varies directly with the temperature of the gas. V 1 T 2 = V 2 T 1 Charles’s Law TempVolume

7. Combined Gas Law Describe that of Charles's and Boyle’s Law P 1 V 1= P 2 V 2 T 1 T 2

8. Solve A cylinder contains air at pressure of 100 kPa has a volume of 0.75 L. The pressure is increased to 300 kPa. Temp does not change, Find the new volume of air. P 1 = 100 kPaP 2 = 300 kPaV 1 = 0.75 L V 2 = ? P 1 V 1 = P 2 V 2 (100 kPa x 0.75 L) = (300 kPa x V 2 ) 0.25 L