First law of thermodynamics: In an isochoric process, the internal (thermal) energy of an ideal gas decreases by 50 J. How much heat is exchanged with the gas during this process?

Question

Quizplus · Accepted Answer

In an isochoric process (constant volume), the work done on or by the gas is zero because there is no volume change. 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. Since the work done is zero and the internal energy decreases by 50 J, the heat exchanged must also be -50 J, indicating that the system releases 50 J of heat.

First Law of Thermodynamics: in an Isochoric Process, the Internal