1. Ideal Gases

2. Ideal Gas vs. Real Gas Gases are “most ideal”… at low P & high T in nonpolar atoms/molecules Gases are “real”… Under low T & high P when they condense

3. PV = nRT Volume # moles of gas Ideal Gas Constant Kelvin Temperature Pressure

4. Units for V, P, n, and T must match R 0.0821 L atm mol K

5. What pressure, in atmospheres, is exerted by 0.325 mol of H 2 gas in a 4,008 mL container at 35 ºC. How many grams of O 2 gas are in a 3.50 L container with a pressure of 1.2 atm at 55 ºC?

6. A sample of an unknown gas has a mass of 0.116g. It occupies a volume of 25.0 mL at a temperature of 127 ºC and a pressure of 155.3 kPa. Calculate the molar mass of the gas.