A gas absorbs 0.0 J of heat and then performs 13.1 J of work.The change in internal energy of the gas is

Question

Quizplus · Accepted Answer

According to the first law of thermodynamics, the change in internal energy (ΔU) of a system is equal to the amount of heat (q) added or removed from the system plus the amount of work (w) done on or by the system: ΔU = q + w. In this case, since the gas absorbs 0.0 J of heat (q = 0) and performs 13.1 J of work (w = 13.1 J), the change in internal energy of the gas is: ΔU = q + w = 0 + 13.1 = 13.1 J. However, since the gas is performing work and losing energy, the change in internal energy is negative, so the final answer is -13.1 J. Therefore, the best choice is D.

A Gas Absorbs 0