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Question

Select correct option regarding change in entropy of system (ΔSsys) and of the surroundings (ΔSsurr).

A
ΔSsys>0,ΔSsurr=0
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B
ΔSsys<0,ΔSsurr>0
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C
ΔSsys=0,ΔSsurr=0
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D
ΔSsys>0,ΔSsurr<0
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Solution

The correct option is A ΔSsys>0,ΔSsurr<0
For irreversible isothermal expansion process,
ΔSsys=nRInV2V1+ve
Since heat is absorbed by the system, so
qsurr=ve
ΔSsurr=ve

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