Which of the following relations correctly expresses the First Law for a heat engine…
PHYSICS · Single correct · A Level · Physics · Engineering physics · Engineering physics
Problem
Which of the following relations correctly expresses the First Law for a heat engine operating in a complete cycle, where QH is the heat absorbed from the hot reservoir, QC is the heat rejected to the cold reservoir, and W is the work done by the engine?
(a) W=QC−QH
(b) QH=QC+W
(c) QH=W−QC
(d) W=QH+QC