In an isochoric process, the internal energy of a system decreases by 50 J. What is the heat flow to the system?
A) zero
B) +50 J
C) −50 J
D) none of the above

Question

Quizplus · Accepted Answer

In an isochoric process (constant volume), no work is done by the system since the volume does not change. Therefore, any change in internal energy is due solely to heat flow. If the internal energy decreases by 50 J, it means 50 J of heat has left the system, hence the heat flow to the system is -50 J.

In an Isochoric Process, the Internal Energy of a System