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1. A system goes from A to B via two processes I and II as shown in figure. If

ΔU1 and ΔU2 are the changes in internal energies in the processes I and II respectively, then

(a) ΔUII  > ΔUI 

(b) ΔU1 < ΔU2

(c) ΔU1 = ΔU2

(d)  Relation between ΔUI  and ΔUII can not be determined

Ans. (c) As internal energy is a point function therefore change in internal energy does not depends upon the path followed i.e. ΔU1 = ΔU2

(158)

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