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IDEAL GAS LAW
Use the Ideal Gas Law equation to solve each problem. The ideal gas law equation is:
PV = nRT
where: P = pressure
V = volume
n = # of moles of given gas
R = universal gas constant
T = temperature
Hints:
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Volume must be in Liters
Temperature must be in Kelvin
Pressure must be in atm or kPa
If mass of the gas is given, convert to moles
using molar masses
R = 0.0821 atm L / mol K
or 8.314 kPa L / mol K
Choose the appropriate “R” value based on
the units given for pressure
1.
It is not safe to put aerosol canisters in a campfire, because the pressure inside the canister gets very high and
they can explode. If I have a 1.0 liter canister that holds 2.0 moles of a gas, and the campfire temperature is
1400oC, what is the pressure inside the can?
2.
How many moles of gas are in a 30.0 liter scuba canister if the temperature of the canister is 300.0 K and the
pressure is 200.0 atmospheres?
3. On a warm day, a 2.20 liter balloon is filled with 0.800 g of helium. The pressure in the balloon is 2.25 atm. What
is the temperature on this day?
4. A camping stove uses a tank that holds 3000.0 g of propane gas (C3H8). What volume tank is needed to hold the
gas at 25°C and a pressure of 3.0 atm?