A cube of air at pressure 1.0 atm is above a hot surface on Earth. Contact with the hot surfaces causes the volume to expand from 2.00 X 10^5L to 2.20 X 10^5L by the transfer of 8.2 X 10^6J of heat. Assume the systems are isolated from the outside world, but not from each other.

Determine the change in energy for the air using the conversion 1L X atm = 101.3J

Please show how you get the answer, I want to learn :)

Question

A cube of air at pressure 1.0 atm is above a hot surface on Earth. Contact with the hot surfaces causes the volume to expand from 2.00 X 10^5L to 2.20 X 10^5L by the transfer of 8.2 X 10^6J of heat. Assume the systems are isolated from the outside world, but not from each other. 

Determine the change in energy for the air using the conversion 1L X atm = 101.3J

Please show how you get the answer, I want to learn :)