Q.

A Carnot engine takes heat from a reservoir at 627°C and rejects heat to the sink at 27°C its efficiency will be:

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a

3/5

b

1/3

c

2/3

d

200/209

answer is C.

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Detailed Solution

η=1−T2T1=1−27+273627+273 =1−300900=1−39=69=23
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A Carnot engine takes heat from a reservoir at 627°C and rejects heat to the sink at 27°C its efficiency will be: