Question

In one cycle of any heat engine

Answer 1

Answer:

D. the net heat flow is zero

Explanation:

In one cycle of any heat engine, three things happen:

• Heat is added; this causes  high temperature in the engine ($Q_H$)

• Some of the energy from that input heat is used to perform work (W).

• The rest of the heat is removed at a relatively cold temperature ($Q_C$).

$Q_H = W + Q_C$

Conclusively, the net heat flow is zero