Question

Consider the same Carnot engine that operates between the temperatures $T_H$ 850 K and $T_L$300 K. The engine performs 1200 J of work each cycle, which takes 0.25 s. What is the average power of this engine?

• A. 4.8 kw
• B. 4.8 w
• C. 5.6 kw
• D. 5.6 w

Answer 1

The correct option is A

4.8 kw

The engine provides 1200 J of work for every cycle.

And every second there are 4 cycles happening.

Therefore every second the engine does $4\times 1200J=4.8kJ$ of energy.

Therefore the power of the engine = 4.8 kw