Name:
Combined Gas Law Worksheet
P
1
V
1
= P
2
V
2
or
P
1
V
1
T
2
= P
2
V
2
T
1
T
1
T
2
1. Helium in a 100 mL container at a pressure of 66.6 kPa is transferred to a
container with a volume of 250 mL. What is the new pressure if no change in
temperature occurs? What is the new pressure if the temperature changes
from 210
o
K to 151
o
K?
2.
What will have to happen to the temperature of a sample of methane if 1000
mL at 98.6 kPa and 25
o
C is given a pressure of 108.5 kPa and a volume of 900
mL?
3.
A gas has a volume of 225 mL at 75
o
C and 175 kPa. What will be its volume at
a temperature of 20
o
C and a pressure of 1.0 X 10
5
kPa?
4.
A gas is heated to 180
o
K and a pressure of 180 kPa. If the container expands to
hold a volume of 800 mL, what was the volume of the gas, (in litres), at a
temperature of 520
o
K and 120 kPa pressure?
5.
A 200 mL sample of gas is collected at 50 kPa and a temperature of 271
o
K.
What volume would this gas occupy at 100 kPa and a temperautre of 14
o
K?

6.
Find the new volumes at STP (273 K and 101.3 kPa)
(a) 24.6 L at 25
o
C and 10 atm (b) 150000 mm