A system has a heat source supplying heat at a rate of 187 W and is doing work at a rate of 130.899998 W.At what rate is the internal energy of the system changing?
A)56.1000022 W
B)317.900009 W
C)-56.100002 W
D)187 W

Question

Quizplus · Accepted Answer

The change in internal energy of the system can be calculated using the first law of thermodynamics: ΔU = Q - W, where Q is the heat added to the system and W is the work done by the system. Here, ΔU = 187 W - 130.899998 W = 56.100002 W.

A System Has a Heat Source Supplying Heat at a Rate