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3. In changing the state of thermodynamics from A to B state

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3. In changing the state of thermodynamics from A to B state, the heat required is Q and the work done by the system is W. The change in its internal energy is

(a)  Q + W                                 (b)  Q – W (c)   Q                                         (d) (Q – W)/2 Ans. b   (3)

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