A heat engine takes in 840 kJ per cycle from a heat reservoir. which is not a possible value of the engine's heat output per cycle?

3 answers

Hmmm. Are there choices listed?
A heat engine takes in 840 kJ per cycle from a heat reservoir. Which is not a possible value of the engine's heat output per cycle?
400 kJ

150 kJ

0 kJ

those are the answer choices