A Carnot engine works between ice point and steam point. Its efficiency will be

85.42 %

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71.23 %

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53.36 %

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26.81 %

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Solution

The correct option is C $26.81 %$
The ice point is $273 K$ and the steam point is $373 K$ . The efficiency of the carnot engine is given as $1 - \frac{T_{2}}{T_{1}} = 1 - \frac{273}{373} = 1 - 0.731 = 0.268 = 26.8 %$

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Efficiency of Carnot engine working between ice point and steam point would be

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