First slide

Heat Engine; Carnot Engine and refrigerator

Question

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

Easy

A

26.8%
B

20%
C

6.25%
D

12.5%

Solution

$η = 1 - \frac{T_{2}}{T_{1}} = 1 - \frac{273}{373} = \frac{100}{373} = 0.268 η % = 26.8 %$

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