9 18 2023 Worksheet Gases A sample of gas has an initial volume of 13 9 L at a pressure of 1 22 atm If the sample is compressed to a volume of 7 87 L what will its pressure be A cylinder with a moveable piston contains 0 553 mol of gas and has a volume of 253 mL What will its volume be if an additional 0 365 mol of gas is added to the cylinder Assume constant temperature and pressure A weather balloon is inflated to a volume of 28 5 L at a pressure of 748 mmHg and a temperature of 28 0oC The balloon rises in the atmosphere to an altitude of approximately 25 000 feet where the pressure is 385 mmHg and the temperature is 15 0oC Assuming the balloon can freely expand calculate the volume of the balloon at this altitude