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Q.

If heat Q is added reversibly to a system at temperature T and heat Q1 is taken away from it reversibly at temperature  T1, then which one of the following is correct.

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a

QT−Q1T1=0

b

QT−Q1T1>0

c

QT−Q1T1<0

d

QT−Q1T1=ΔU

answer is B.

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Detailed Solution

Since, Q>Q1⇒QT>Q1T1⇒QT−Q1T1>0
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