T1=500 K, T2=375 K, Q1=252×104 J
i. η=1-T2T1×100%=1-375500×100%=25% Ans.
ii. W=ηQ1=25100×252×104 J=6.3×105 J Ans.
iii. T1T2=Q1Q2⇒500375=252×104Q2
∴Q2=1.89×106 J Ans.
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