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A system goes from P to Q by two different paths in the P-V diagram as shown in Figure. Heat given to the system in path 1 is 1000 J. The work done by the system along path 1 is more than path 2 by 100 J. What is the heat exchanged by the system in path 2?

Answers (1)

For path 1 Q1=1000J

$WD=W_1-W_2=100$

$W_1=WD$ through path 1

$W_2=WD$ through path 2

$W_{2}=W_{1}-100$ (Change in internal energy by both paths are same)

$\Delta U=Q_{1}-W_{1}=Q_{2}-W_{2}\\ 1000-W_{1}=Q_{2}-(W_1-100)$

$Q_2=900J$

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infoexpert24

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