Charles' Law

Charles' law is also known as Temperature-Volume Relationship. This law was studied by Jacques Charles in 1787 using a balloon.

This law states that if temperature is increased, the volume of the gas will increase. Volume is directly proportional to temperature if the pressure is kept constant.

Charles' law can be mathematically expressed as:

V1/T1 = V2/T2

where:

• V1 = initial volume
• T1 = initial temperature (in Kelvin)
• V2 = final volume
• T2 = final temperature (in Kelvin)

Problem Solving Reminders:

• Analyze the given problem.
• List down the given values and what is asked.
• Identify the formula to be used.
• Write your solutions clearly.
• Analyze if your answer is theoritically correct.

Sample Problem #1:
A balloon has a volume of 2500.0 mL on a day when the temperature is 30.0ºC. If the temperature at night falls to 10.0ºC, what will be the volume of the balloon if the pressure remains constant?

Sample Problem #2:
Find the final temperature of a 2.00-L gas sample at 20.0ºC compressed to a volume of 1.00-L.