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Question

For irreversible expansion of an ideal gas under isothermal condition, the correct option is :

A
Δ0,ΔS total=0
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B
Δ=0,ΔS total=0
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C
Δ0,ΔStotal0
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D
Δ=0,ΔS total0
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Solution

The correct option is D Δ=0,ΔS total0
For a spontaneous process, ΔS total>0 and since irreversible process is always spontaneous therefore ΔS total>0.

Since Δ=nCVΔT and ΔT=0 for isothermal process therefore Δ=0.
So possible Answer is Option (d)

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