A balloon is filled with 35.0 L of helium in the morning when the temperature is 35.00 oC.

By noon the temperature has risen to 45.00 oC. What is the new volume of the balloon?

Answer: V = 33.9 L

Explanation: We will use Charles Law to solve for the new volume.

Charles Law is expressed in the following formula. Temperatures must be converted in Kelvin.

V1 / T1 = V2 / T2 then derive for V2

V2 = V1 T2 / T1

= 35 L (308 K) / 318 K

= 33.9 L