1. What volume will 1 mole of a gas occupy at STP? STP = 273K, 1.013x10 5 Pa One mole of any ideal gas occupies a volume of 22.4L at STP.

2. 0.02kg of O 2 is held in a rigid container with a volume of 0.015m 3. If the temperature of the oxygen is 30°C what is its pressure?

3. A rigid (constant volume) container holds 0.7kg of methane (CH 4 ) at 20°C (=293K) and 1.1x10 5 Pa. If 3x10 5 J of heat flows into the gas, what will be its final pressure?

4. At constant volume:

5. A 0.025m 3 cylinder with a movable piston contains 1.2 moles of CO2 at 300K and 1.5x10 5 Pa. How much work would be required to isobarically compress the gas to 70% of its initial volume? How much heat will flow? By how much will the thermal energy of the gas change?

6. Work done ON the gas Heat flowed out of gas. The thermal energy decreased by this amount.