A certain gas is compressed adiabatically. The amount of work done on the gas is 800 J. What is the change in the internal energy of the gas?
A) 800 J
B) -800 J
C) 400 J
D) 0 J
E) More information is needed to answer this question.

Question

Quizplus · Accepted Answer

In an adiabatic process, there is no heat exchange with the surroundings (Q = 0). According to the first law of thermodynamics, ΔU = Q - W. Since Q = 0, ΔU = -W. Therefore, the change in internal energy is equal to the work done on the gas, which is 800 J.

A Certain Gas Is Compressed Adiabatically