A balloon of air deflates and does 300kj of work to the surrounding air. While deflating, the air inside the balloon transfer 60kj of energy to the outside of the balloon. What is the total change of the internal energy of the air inside the balloon when it deflates

1 answer

To find the total change in internal energy of the air inside the balloon, we need to consider the work done by the balloon on the surrounding air and the energy transferred from the inside to the outside of the balloon.

Given:
Work done by the balloon on the surrounding air = -300 kJ (negative because the work is done on the surrounding air)
Energy transferred from the inside to the outside of the balloon = -60 kJ (negative because energy is transferred out of the system)

Total change in internal energy of the air inside the balloon = Work done + Energy transferred
= -300 kJ + (-60 kJ)
= -360 kJ

So, the total change in the internal energy of the air inside the balloon when it deflates is -360 kJ.