Ideal Gas Law Test Questions

Question 1

A balloon contains 4 moles of an ideal gas with a volume of 5.0 L.

If an additional 8 moles of the gas is added at constant pressure and temperature, what will be the final volume of the balloon?

Question 2

What is the density (in g/L) of a gas with a molar mass of 60 g/mol at 0.75 atm and 27 °C?

Question 3

A mixture of helium and neon gases is held in a container at 1.2 atmospheres. If the mixture contains twice as many helium atoms as neon atoms, what is the partial pressure of helium?

Read More

Ideal Gas Law: Worked Chemistry Problems

By Anne Marie Helmenstine, Ph.D.

Question 4

4 moles of nitrogen gas are confined to a 6.0 L vessel at 177 °C and 12.0 atm. If the vessel is allowed to expand isothermally to 36.0 L, what would be the final pressure?

Question 5

A 9.0 L volume of chlorine gas is heated from 27 °C to 127 °C at constant pressure. What is the final volume?

Question 6

The temperature of a sample of an ideal gas in a sealed 5.0 L container is raised from 27 °C to 77 °C. If the initial pressure of the gas was 3.0 atm, what is the final pressure?

Question 7

A 0.614 mole sample of ideal gas at 12 °C occupies a volume of 4.3 L. What is the pressure of the gas?

Question 8

Helium gas has a molar mass of 2 g/mol. Oxygen gas has a molar mass of 32 g/mol.
How much faster or slower would oxygen effuse from a small opening than helium?

Question 9

What is the average velocity of nitrogen gas molecules at STP?
Molar mass of nitrogen = 14 g/mol

Question 10

A 60.0 L tank of chlorine gas at 27 °C and 125 atm springs a leak. When the leak was discovered, the pressure was reduced to 50 atm. How many moles of chlorine gas escaped?

Answers

1. 15 L

10. 187.5 moles