In the first law of thermodynamics (ΔU = Q + W), the variables Q and W stand for
A) the heat flow out of the system and the work done on the system.
B) the heat flow out of the system and the work done by the system.
C) the heat flow into the system and the work done by the system.
D) the heat flow into the system and the work done on the system.

Question

Quizplus · Accepted Answer

In the first law of thermodynamics, Q represents the heat flow into the system, and W represents the work done on the system.

In the First Law of Thermodynamics (ΔU = Q