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Q.

A carnot engine absorbs 2000 J  of heat from the source of heat engine at 2270C  and rejects 1200 j  of heat during each cycle to sink, the temperature of sink and workdone during each cycle is

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a

270C,800J

b

3000C,800J

c

400C,480J

d

270C,480J

answer is A.

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Detailed Solution

n=1−Q2Q1=1−12002000=1−35=25=0.4 n=1−T2T1 0.4=1−T2227+273 0.6=T2500 T2=300K=270Cn=wQ1⇒0.4=w2000⇒w=800J
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