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) 400 J
B) 0 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, if the work is done on the system and there's no change in temperature, the internal energy remains unchanged. Therefore, the change in internal energy is 0 J.

The Work Done on an Ideal Gas System in an Isothermal