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Question

The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is?


A
6.25%
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B
26.8%
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C
12.5%
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D
20%
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Solution

The correct option is B $$26.8\%$$
$$ \eta_{heat engine} = 1 - \dfrac{Q_{c}}{Q_{h}} = 1 - \dfrac{T_{c}}{T_{h}} = 1 - \dfrac{273}{373} \times 100 $$
$$ \eta = 26.80 %$$
option 2 is correct answer

Physics

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