Question

A system releases 20 J of heat into its surroundings while the surroundings

perform 80 J of work on the system. What is the change of energy of the
system? (Use AU=Q-W]

Answer 1

The change of energy is 60J

Step-by-step explanation:

We have a closed system, which receives 80 J of energy. It means this energy is entering the system. And also we have 20 J that is dissipating in the shape of heat.

Therefore the amount remaining in the system will be 80 - 20 = 60 J