The P - V diagram of a system undergoing...

The `P - V` diagram of a system undergoing thermodynamic transformation is shown in figure. The work done by the system in going from `A rarr B rarr C is 30 J` and `40 J` heat is given to the system. The change in internal energy between `A and C` is

10 J

70 J

84 J

134 J

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The correct Answer is:

Heat given `DeltaQ`=40 J and Work done `DeltaW`=30 J `rArr DeltaU=DeltaQ-DeltaW=40-30` = 10 J

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