Gas law problems Name You`ll need to use partial pressure

Gas law problems
Name
You’ll need to use partial pressure, combined, or the ideal gas law equation for the following
problems. Be sure to show the set-up of your problem so if there is a problem we can figure out
what you did. Remember the chant for converting temperature.
R = 8.31 L kPa/ mol K
R = 0.821 L atm/mol K
1. A cylinder of compressed gas has a pressure of 4.882 atm on one day. The next day, the
same cylinder of gas has a pressure of 4.690 atm, and its temperature is 8 oC. What was
the temperature the previous day in oC?
ANS________
2. A student collects a sample of H2S gas over water at a temperature of 27 oC. The total
pressure of the gas that has displaced a volume of 15 mL of water is 207.33 kPa. What is
the pressure of the H2S collected? ( be sure to use the partial pressure handout).
ANS________
3. A 2.2 L sample of hydrogen at 6.5 atm is used to fill a balloon at a final pressure of 1.15
atm. What is its final volume?
ANS________
4. A sample of argon has a volume of 0.43 L at 24 oC. At what temperature in oC will it have
a volume of 0.57 mL.
ANS________
5. A large balloon contains 11.7 g helium. What volume will the helium occupy at an
altitude of 10,000 m, where the atmospheric pressure is 0.262 atm and the temperature
is -50 oC.
ANS________
6. A student collects 425 mL of oxygen at a temperature of 24 oC and a pressure of 0.89
atm. How many moles of oxygen did the student collect?
ANS________
7. What pressure, in atm, is exerted by 0.325 mol of hydrogen gas in a 4.08 L container at
35 oC?
ANS_______
8. A student collects 450 mL of HCl gas at a pressure of 100 kPa and a temperature of 17
oC. What is the volume of the HCl at 0 oC and 101.3 kPa?
ANS________