First slide

Heat engine

Question

The efficiency of a Carnot engine working between steam point and ice point is

Easy

A

16.8 %
B

26.81 %
C

36.8 %
D

46.8 %

Solution

$\begin{array}{l} T_{2} = ice point = 0 + 273 = 273 K \\ T_{1} = steam point = 100 + 273 = 373 K \\ η = 1 - \frac{273}{373} = \frac{100}{373} \times 100 = 26 \cdot 81 % \end{array}$

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