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2 moles of ann ideal gas at `27^(@)C` are expanded reversibly from 2L to 20 L. find entropy change. (R=2 cal/mol K)

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2 moles of ann ideal gas at `27^(@)C` are expanded reversibly from 2L to 20 L. find entropy change. (R=2 cal/mol K)
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`DeltaS=2.303"nR log"(V_(2))/(V_(1))`
`=2.303xx2xx2xx"log"(20)/(2)=9.2`
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