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Oxygen gas weighing 64 g is expanded fro...

Oxygen gas weighing 64 g is expanded from 1 atm to 0.25 atm at `30^(@)C` calculate entropy change, assuming the gas to be ideal.

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`n=(w)/(m.wt.)=(64)/(32)=2`
`DeltaS=2.303nR" "log((P_(1))/(P_(2)))`
`=2.303xx2xx8.314log((1)/(0.25))`
`=23.053JK^(-1)`
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