The work done on an ideal gas system in an isothermal process is -400 J.What is the change in internal (thermal)energy of the gas?
A)0 J
B)-400 J
C)400 J
D)200 J

Question

Quizplus · Accepted Answer

For an ideal gas undergoing an isothermal process, the temperature remains constant. According to the first law of thermodynamics, the change in internal energy is zero when the temperature is constant, regardless of the work done on or by the system.

The Work Done on an Ideal Gas System in an Isothermal