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Q.

Figure below shows two paths that may be taken by a gas to go from a state A to a state C : In process AB, 400 J of heat is added to the system and in process BC, 100 J of heat is added to the system. The heat absorbed by the system in the process AC will be :

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a

500 J

b

460 J

c

300 J

d

380 J

answer is B.

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Detailed Solution

In cyclic process ABCA,         ∆Ucyclic =0      Qcyclic=Wcyclic  QAB+QBC+QCA=closed loop area 400+100+QCA=12×2×10-3×4×104 400+100-QAC=40                      QAC=460 J
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