Question

What should be the condition for the efficiency of a Carnot engine to be equal to 1?

Answer 1

Efficiency of Carnot engine, $\eta =\frac{W}{Q_1}=\frac{Q_1-Q_2}{Q_1}$

Here,
W = Work done by the engine
Q₁ = Heat abstracted from the source
Q₂ = Heat transferred to the sink

Thus, for $\eta =1,W=Q_{1}or{Q}_2=0$, the total heat which is abstracted from the source gets converted into work.