A system is acted on by its surroundings in such a way that it receives 50 J of heat while simultaneously doing 20 J of work.What is its net change in internal energy?

Question

Quizplus · Accepted Answer

According to the First Law of Thermodynamics, the change in internal energy of a system is equal to the heat added to the system minus the work done by the system. Therefore, ΔU = Q - W = 50 J - 20 J = 30 J. The net change in internal energy is 30 J.

A System Is Acted on by Its Surroundings in Such