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Q.

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

70 J

b

10 J

c

84 J

d

134 J

answer is A.

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Detailed Solution

Heat given ∆Q = 40 J and Work done ∆W = 30 J
∆U = ∆Q – ∆W = 40 – 30 = 10 J

 

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