# Worksheet: The Combined Gas Equation

In this worksheet, we will practice using the combined gas equation to relate the pressure, volume, and temperature of two systems and calculate unknowns.

Q1:

A spray can is used until it is empty except for the propellant gas, which has a pressure of 1,344 torr at . If the can is thrown into a fire , what will the pressure be in the hot can?

• A torr
• B torr
• C torr
• D torr
• E torr

Q2:

A 2.50 L volume of hydrogen measured at is warmed to . Calculate the volume of the gas at the higher temperature, assuming there is no change in pressure.

Q3:

A cylinder of medical oxygen has a volume of 35.4 L and contains at a pressure of 151 atm and a temperature of . Calculate, to 3 significant figures, the volume of this quantity of at normal body conditions, 1.00 atm and .

Q4:

A sample of carbon dioxide, , occupies 0.300 L at and 1 bar. What volume will the gas have at and 1 bar, assuming behaves as an ideal gas?

Q5:

A balloon with a volume of 100.21 L at and 0.981 atm is released and rises to a higher altitude. If the final volume of the balloon is 144.53 L at a temperature of , what is the pressure inside the balloon at its final altitude?

Q6:

Nitrogen and hydrogen can react together to form ammonia according to the following equation.

Ammonia is an important fertilizer and industrial chemical. Suppose that a volume of 683 billion cubic feet of gaseous ammonia, measured at and 1 atm, was manufactured. What volume of , measured under the same conditions, was required to prepare this amount of ammonia by reaction with ?

• A ft3
• B ft3
• C ft3
• D ft3
• E ft3

Q7:

For a fixed quantity of an ideal gas at constant temperature, which graph depicts the expected relationship between pressure and volume ?

• A • B • C • D Q8:

For a fixed quantity of an ideal gas at constant volume, which graph depicts the expected relationship between pressure and temperature ?

• A • B • C • D 