In an isochoric process, the internal energy of a system decreases by 50 J. What is the work done on the system?
A) zero
B) +50 J
C) −50 J
D) None of these choices are correct.

Question

Quizplus · Accepted Answer

In an isochoric process, the volume of the system remains constant, so there is no work done by or on the system (W = 0). The change in internal energy (∆U) is solely due to heat transfer (Q) or other internal processes, such as chemical reactions or phase changes. Therefore, the work done on the system is zero (Choice A).

In an Isochoric Process, the Internal Energy of a System