Daniel would like to test a composite insulation he has made. He uses a heat box that will heat 7 kg of air. The specific heat of air is 1000 J/kgC. He records the temperature inside the box at the start to be 58C, the box heats to maximum temperature to be 99C, and then cools to a final temperature of 73C. Determine the energy gained by the air in the box during heating – Q(heat) in J (Joules).