Question

Carnot's heat engine takes $300J$ of heat from a source at ${627}^{\circ }C$ and gives some part of it to sink at ${27}^{\circ }C$. Work done by engine in one cycle is.

• A. $200J$
• B. $300J$
• C. $150J$
• D. $120J$

Answer 1

The correct option is A $200J$

$\eta =\frac{T_1-T_2}{T_1}=\frac{900-300}{900}=\frac{2}{3}$

work done is $W=300\times \frac{2}{3}=200J$