Ideal Gas Law
Name ______________________________
Date __________________ Period _______
Given: Ideal Gas Law =
then
P=
n=
V=
T=
R=
1. What pressure is required to contain 0.023 moles of nitrogen gas in a 4.2 L container at a
temperature of 20.C?
2. Oxygen gas is collected at a pressure of 123 kPa in a container which has a volume of 10.0 L. What
temperature must be maintained on 0.500 moles of this gas in order to maintain this pressure? Express
the temperature in degrees Celsius.
3. How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 100.0 kPa and a
temperature of 100. C? After determining the number of moles, calculate the number of grams of
chlorine (Cl2) contained in this container?
4. What is the volume of a balloon if it contains 3.2 moles of helium at a temperature of 20. C and
standard pressure?
5. Calculate the volume which 1.00 mole of a gas occupies at STP.
6. What volume would 20.0g of CO2 occupy at a temperature of 25 C and a pressure of 105 kPa?
7. A 23.6g sample of an unknown gas occupies a volume of 12.0 L at standard temperature and pressure.
What is the molecular mass of this gas?
1
8. What mass of nitrous oxide gas (N2O) is contained in 20.0 L balloon at a pressure of 110.0 kPa and a
temperature of 25 C?
True and False: If the statement is true, write “true.” If it is false, change the underlined word or
words to make the statement true. Write your answer on the line provided.
_____________________
1. Real gases behave like ideal gases except at very high temperatures.
_____________________
2. The gas constant, R, is equal to 0.0821 when the pressure is expressed in
kilopascals.
_____________________
3. As more gas particles are added to a container, there are fewer collisions
because the particles don’t go as far.
_____________________
4. The number of moles of a gas is inversely proportional to its volume at
STP.
_____________________
5. Real gases behave like ideal gases except at very high pressure.
_____________________
6. At a constant temperature, the pressure exerted by one mole of a gas
decreases if the volume available is increased.
_____________________
7. The ideal gas equation will only give correct values if the temperature in
expressed in degrees Celcius.
_____________________
8. One mole of oxygen at 760. mm Hg and 0 °C occupies a volume of one L.
Matching: Match each variable listed on the left with the appropriate unit of measurement listed on the
right. You may write one or more letters on each line. Circle the ones used in the Ideal Gas
Equation.
___________________ 9. number of moles
___________________ 10. volume
___________________ 11. pressure
___________________ 12. temperature
A. °C
B. kg
C. mol
D. mm Hg
E. K
F. L
G. atm
H. Pa
I. °F
J. m3
K. cm3
L. kPa
M lb/in2
2