1. Temperatures must be in Kelvin!
ANIMATION
Charles’ Law
There is a direct relationship between the temperature and volume of a gas (if one increases so does the other)
If pressure is held constant:
V1 = V2
T1 T2
Temperatures must be in Kelvin!
KMT – as the temperature decreases the particles move slower causing less collisions; the volume will decrease

2. Example
5.00 L of a gas is collected at 100 K and then allowed to expand to 20.0 L. What must the new temperature be in order to maintain the same pressure (as required by Charles' Law)?
V1 = V2
T1 = T2
V1 =
T1 =
V2 =
T2 =
5.00L
100K
20.0L
5.00L = 20.0L
100K T
T = 400K ?

3. Example
A gas has an initial volume of 15 L. If the temperature increases from 330 ºC to 450 ºC find the new volume.
V1 = V2
T1 T2
V1 =
T1 =
V2 =
T2 =
15L
330C = 603K ?
15L = V
603K 723K
V = 18 L
450C = 723K

4. A quantity of gas has a volume of 254 mL at 27ºC
A quantity of gas has a volume of 254 mL at 27ºC. When the temperature becomes 17ºC at constant pressure the gas has a volume of
iRespond Question
Multiple Choice F
V = V
T T
254mL = V
300K K
A.) 263 mL
B.) 246 mL
C.) 299 mL
D.) 160 mL
E.)

5. F
Multiple Choice
iRespond Question
If the temperature on a given mass of gas in a closed system is increased and the volume remains constant, the pressure of the gas will
A.) decrease
B.) increase
C.) remain the same
D.)
E.)