During an isochoric process, the internal (thermal) energy of a gas decreases by 50 J. How much heat is added to the gas during this process?
A) 25 J
B) -50 J
C) 0 J
D) -25 J
E) 50 J

Question

Quizplus · Accepted Answer

In an isochoric process, the volume of the gas remains constant, meaning no work is done on or by the gas. Therefore, any change in internal energy is due solely to heat exchange. If the internal energy decreases by 50 J, it means 50 J of heat was removed from the gas, hence -50 J.

During an Isochoric Process, the Internal (Thermal) Energy of a Gas