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A Carnot engine takes 5000 kcal of heat ...

A Carnot engine takes 5000 kcal of heat from a reservoir at `727^(@)` C and gives heat to a sink at `127^(@)` C. The work done by the engine is-

A

`3 xx 10^(6) J`

B

Zero

C

`12.6 xx 10^(6) J`

D

`8.4 xx 10^(6)` J

Text Solution

Verified by Experts

Given,
`T_(1) = 727 + 273 = 1000 K`
`T_(2) = 227 + 273 =400 K`
`Q_(1) = 3000` K.cal
Efficiency
`eta = w/Q_(1) = 1 - T_(2)/T_(1)`
`= 5000 (3/5) 10^(3)` cal
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