Question

In one cycle of any heat engine

A. the net work done is larger than the heat exhausted.
B. more heat flows from the engine than enters the engine.
C. The internal energy of the engine does not change.
D. the net heat flow is zero.​​

Answer 1

D. the net heat flow is zero

Step-by-step 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