A gas absorbs 0.0 J of heat and then performs 99.5 J of work.What is the change in internal energy of the gas?
A)-99.5 J
B)59.5 J
C)139.5 J
D)99.1 J
E)none of these

Question

Quizplus · Accepted Answer

According to the first law of thermodynamics, the change in internal energy (ΔU) is equal to the heat added to the system (Q) minus the work done by the system (W). Here, Q = 0.0 J and W = 99.5 J, so ΔU = 0.0 J - 99.5 J = -99.5 J.

A Gas Absorbs 0