The P - V diagram of a system undergoing thermodynamic transformation is given below. The work done by the system is going from A → B → C is 30 J and 4 J heat is given to the system. What will be the change in internal energy between A and C?

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26 J

−26J

34 J

−34J

answer is B.

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Detailed Solution

ΔQ=W+ΔUΔU=ΔQ−W =(4-30) J = -26 J

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