Question

Calculate the thermal efficiency of a Carnot's heat engine working between ice point and steam point.

• A. $26.81\%$
• B. $33.33\%$
• C. $12.97\%$
• D. $83.19\%$

Answer 1

The correct option is A $26.81\%$

Ice point $=0^{\circ }C=273\text{K}$,
and steam point $={100}^{\circ }C=373\text{K}$
Temperature of source, $\Rightarrow T_1=373\text{K}$
Temperature of sink, $\Rightarrow T_2=273\text{K}$
Thermal efficiency of carnot's heat engine:
$\Rightarrow \eta =1-\frac{T_2}{T_1}$$\Rightarrow \eta =1-\frac{273}{373}$
$\therefore \eta =0.2681\times 100=26.81\%$