Q.

An ideal gas heat engine operates in Carnot cycle between 2270C and 1270C . It absorbs 6×104 cals of heat at higher temperature. Amount of heat converted to work is (in cal)

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a

2.4×104

b

6×104

c

1.2×104

d

4.8×104

answer is C.

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Detailed Solution

η=T1−T2T1=WQ⇒W=Q(T1−T2)T1 =6×104[(227+273)−(273+127)](227+273) =6×104×100500=1.2×104cal
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An ideal gas heat engine operates in Carnot cycle between 2270C and 1270C . It absorbs 6×104 cals of heat at higher temperature. Amount of heat converted to work is (in cal)