1. IT’S A GAS DAY BEFORE THE WEEKEND

2. Agenda Finish Substance Test and turn in. Start working on 3 Gas Worksheets – 4 th available to make up a missing homework grade. Turn in Lab Report Hand out interims Discuss Boyle, Charles and Gay Lusac’s laws Absolute Zero Video

3. Density Property of a gas. Very constant for a solid Fairly constant for a liquid Varies all over the place for a gas.

4. Boyle’s Law PV = Constant or P = Constant/V P 1 V 1 = Constant = P 2 V 2 Hint: 1.Pressure Units don’t matter. 2.Volume Units don’t matter. 3.Assumes an ideal gas.

5. Gay Lussac’s Law V = Constant T or V/T = Constant V 1 /T 1 = Constant = V 2 /T 2 Hint: 1.Pressure Units don’t matter. 2.T Units matter. It must be Kelvin 3.T kelvin = T centigrade +273.15 4.Assumes an ideal gas. Note that Charle’s law Deals with Pressure and Temp. Since you know the relationship between pressure and volume, I won’t go over.

6. What you gotta remember Combined Law P 1 x V 1 = P 2 x V 2 T 1 T 2 One variable will be held constant and they give you 3 of the remaining 4 terms.

7. Partial Pressure

8. Vapor Pressure Vapor Pressure depends ONLY on temperature. It is specific for every liquid.

9. Please finish Worksheets