1. WARM UP 1.List 3 characteristics of gases indicated by Clerk-Maxwell’s kinetic- molecular theory.

2. Ideal Gases

3. Ideal Gas Law Deals with ideal gases… – Ideal gases are in a small volume compared to the container, and have particles that don’t attract or repel one another … at STP – standard temperature (0° C) and pressure (1 atm) 1 mole of a gas occupies 22.414 L

4. Ideal Gas Law PV = nRT – R is the gas constant.082057 L·atm/K·mol at STP

5. WRAP UP List 4 assumptions we make about the behavior of ideal gases, or about the properties of gases in general.

6. WARM UP 1.How many grams of helium are required to fill a 725 L hot air balloon to a pressure of 1425 mmHg at 55° C?

7. WRAP UP A sample of nitrogen gas was bubbled through liquid water at 25°C and then collected in a volume of 750 cm 3. The total pressure of the gas, which was saturated with water vapor, was found to be 740 mmHg at 25°C. The vapor pressure of water at this temperature is 24 mmHg. How many moles of nitrogen were in the sample?

8. WARM UP “Self-knowledge is the beginning of self-improvement.” – Baltasar Gracian 1.What does this mean to you? 2.Identify one thing you could realistically improve on over the next month.

9. WRAP UP Hydrogen and helium are mixed in a 20.0 L flask at room temperature (20°C). The partial pressure of the hydrogen is 250 mmHg and that of helium is 75 mmHg. How many grams of H 2 and He are present?