In a cyclical process, such as a heat engine, the net work done by the system equals the net heat transfer into the system, or W=Qh−Qc, where Qh is the heat...In a cyclical process, such as a heat engine, the net work done by the system equals the net heat transfer into the system, or W=Qh−Qc, where Qh is the heat transfer from the hot object (hot reservoir), and Qc is the heat transfer into the cold object (cold reservoir).
