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Q.

Two moles of an ideal gas is expanded irreversibly and isothermally at 370C until its volume is doubled and 3.41 kJ heat is absorbed from surrounding. ∆Stotal (system + surrounding) is

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a

-0.52 J/K

b

0.52 J/K

c

22.52 J/K

d

0

answer is B.

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Detailed Solution

∆Ssystem=nR ln V2V1=2 × R×ln 2=11.52 J/K ∆Ssurrounding=- ∆HT=-3.41 × 1000310=-11 J/K ∆Stotal=+11.52-11=+0.52 J/K
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