Name:
Chemistry Practice Problems: The Gas Laws
Solve the following gas law problems. Make sure to include units in your answer. Tell which
law was used to solve each one.
1. A sample of O2 gas occupies a volume of 2.00 L at 27 ˚C and 2.00 atm pressure. What
volume, in liters, will this O2 sample occupy at the same temperature but at 3.2 atm?
Answer: _____________ Law: _____________
2. A sample of air exerts a pressure of 1.00 atm at 22C. If the sample's volume remains
constant, what is the new pressure, in atmospheres, exerted by the air when it is heated to
122C?
Answer: _____________ Law: _____________
3. 5.00 L of a gas is known to contain 0.965 mol. If the amount of gas is increased to 1.80 mol,
what new volume will result (at an unchanged temperature and pressure)?
Answer: _____________ Law: _____________
4. A spray can is empty except for the propellant gas, which exerts a pressure of 1.2 atm at
24C. If the can is thrown into a fire (485C), what will be the pressure, in atmospheres,
inside the hot can?
Answer: _____________ Law: _____________
5. A sample of carbon dioxide gas, CO2, has a volume of 5.00 L at 35C. What volume, in
liters, will this CO2 gas occupy at 125C if the pressure is held constant?
Answer: _____________ Law: _____________
6. How many moles of H2 gas does it take to fill a 6000 mL container at a fixed pressure and
temperature if 34 moles occupy a 4000 mL container?
Answer: _____________ Law: _____________
7. A sample of Cl2 gas fills a 3.3 L container at a pressure of 645 mm Hg and is transferred to a
new container having a volume one-third that of the original container. What pressure, in
millimeters of mercury, does the Cl2 exert in the new container? Assume that the temperature
does not change.
Answer: _____________ Law: _____________
8. 3.4 mol of vapor water is contained in a 342.4 mL container. If pressure and temperature are
held constant, what volume of container would be required to hold 6.4 moles of vapor water?
Answer: _____________ Law: _____________
9. A sample of CO2 gas has a volume of 13 L at a pressure of 876 mm Hg and a temperature of
33C. Determine the temperature, in Kelvin, when volume is compacted to 0.973 L and
pressure remains constant.
Answer: _____________ Law: ____________
10. If the temperature of 0.54 L of N2 gas at 383 K is raised by 60, what is the new volume when
pressure is held constant?
Answer: _____________ Law: _____________
11. A sample of air exerts a pressure of 2.00 atm at 42C. If the sample's volume remains
constant, what is the new temperature of the air when pressure is increased to 4.5 atm?
Answer: _____________ Law: _____________
12. Suppose that you had a 3.15 L sample of neon gas at 21C and a pressure of 0.951 atm.
What would be the volume of this gas if the pressure were increased to 1.564 atm while the
temperature remained constant?
Answer: _____________ Law: _____________
13. A sample of 5.6 mol chlorine gas has a volume of 21.6 L. If the temperature and pressure of
the chlorine are held constant, how many moles of Cl2 gas are able to be contained in 13.8 L?
Answer: _____________ Law: _____________
14. A sample of air exerts a pressure of 1234 mm Hg at 143C. If the sample's volume remains
constant, what is the new temperature of the air when its pressure is reduced to 544 mm Hg?
Answer: _____________ Law: _____________
15. 20 L of carbon dioxide was collected at 23C and 1 atm pressure. What would be the volume
of carbon dioxide if it were collected at 23C and 0.830 atm?
Answer: _____________ Law: _____________
16. A balloon contains 5.41 L of helium at 24C and 101.5 kPa. Suppose the gas in the balloon
is heated to 35C. If the helium pressure is held constant, what is the volume?
Answer: _____________ Law: _____________
17. The total volume of oxygen that can be obtained from a particular tank at 1 atm and 21C is
785 L. Assuming that pressure is maintained constant, what would be the volume of the
oxygen if the temperature is raise to 28C.
Answer: _____________ Law: _____________
18. If you expect a chemical reaction to produce 4.38 L of oxygen at 19C and 101,000 Pa, what
would be the pressure at 25C with volume remaining constant?
Answer: _____________ Law: _____________
19. Poisonous carbon monoxide gas is a product of the internal combustion engine. If there are
1.2 mol of CO at 11C and 102 mm Hg in a 1.0 L container, how many moles may be
contained in a 2.0 L container at the same temperature and pressure?
Answer: _____________ Law: _____________
20. A bacterial culture isolated from sewage produced 41.3 mL of methane, CH4, at 31C and 1
atm. What is the volume of this methane at STP?
Answer: _____________ Law: _____________