First law of thermodynamics: During an adiabatic process, an ideal gas does 25 J of work. What is the change in the internal (thermal) energy of the gas during this process?

Question

Quizplus · Accepted Answer

By the first law of thermodynamics, the change in internal (thermal) energy of the gas is equal to the work done on or by the gas in an adiabatic process. Since the gas does 25 J of work during the process, the change in internal energy is -25 J (negative because the work is done by the gas). Therefore, the answer is D, -25 J.

First Law of Thermodynamics: During an Adiabatic Process, an Ideal