To solve mathematical problems you should know the formula for Charles’ law.
V1T2 = V2T1 or V1/T1 = V2/T2
Click on the link below to access the activity and review how to use Charles’ Law to calculate temperature or volume. Click on the balloon that says "Next" to move through the activity.
Now try this problem:
5L of a gas is collected at 100K and then allowed to expand to 20.0L. What must the new temperature be in order to maintain the pressure?
Now practice more Charles’ Law problems by working through the following this tutorial