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 22C. If the sample's volume remains
constant, what is the new pressure, in atmospheres, exerted by the air when it is heated to
122C?
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
24C. If the can is thrown into a fire (485C), 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 35C. What volume, in
liters, will this CO2 gas occupy at 125C 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
33C. 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 42C. 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 21C 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 143C. 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 23C and 1 atm pressure. What would be the volume
of carbon dioxide if it were collected at 23C and 0.830 atm?
Answer: _____________ Law: _____________
16. A balloon contains 5.41 L of helium at 24C and 101.5 kPa. Suppose the gas in the balloon
is heated to 35C. 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 21C is
785 L. Assuming that pressure is maintained constant, what would be the volume of the
oxygen if the temperature is raise to 28C.
Answer: _____________ Law: _____________
18. If you expect a chemical reaction to produce 4.38 L of oxygen at 19C and 101,000 Pa, what
would be the pressure at 25C 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 11C 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 31C and 1
atm. What is the volume of this methane at STP?
Answer: _____________ Law: _____________
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