1. If the pressure of a 7.2 liter sample of gas changes from 735 torr to 800.torr and the temperature remains constant, what is the new volume of the gas? 2. A gas expands from 4.7 liters to 10.0 liters and at the same time its pressure changes from 756 torr to 1.2 atm. If the temperature of the gas at the expanded volume is 30.oC, what was the original temperature Celsius of the gas before it expanded and changed pressure?

3. To what temperature (Celsius) must a gas at 50.oC and 107 kPa be heated in order to increase its pressure to 3.50 atm if the volume of the gas remains constant?

4. A gas whose pressure is 1.34 atm occupies a volume of 46.9 liters. This gas is allowed to expand to 65 liters and the temperature remains constant. What is the pressure of the gas at the expanded volume?

5. 39.1 milliliters of gas whose temperature if 25oC is heated to 98oC and the pressure remains constant. What is the new volume of the gas now?

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6. A student collects 450. mL of HCl(g) at a pressure of 100. kPa and a temperature of 17 oC. What would be the volume of the HCl at STP?

7. If 100. milliliters of a gas, originally at 760. torr, is compressed to a pressure of 120. kPa, and the temperature remains constant, what will the final volume be?

8. A volume of 20.0 liters of oxygen is warmed from -30.oC to 85oC. What is the volume of the gas at 85oC if the pressure is kept constant.

9. A gas has a pressure of 1.45 atm when the temperature is 80.oC. What would be its pressure if the temperature is changed to 35oC if the gas is confined to a rigid container whose volume will not change?

10. A student collects oxygen gas by water displacement at a temperature of 16 oC. The total volume is 188 mL at a pressure of 92.3 kPa. What is the pressure of oxygen collected?