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Calculate w, q and DeltaU when 0.75 mol ...

Calculate w, q and `DeltaU` when 0.75 mol of anideal gas expands isothermally and revensibly at `27^(@)C` from a volume of 15L to 25L

Text Solution

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For isothermalreversible expansion of an ideal gas,
`w=-nRT" in"(V_(2))/(V_(1))=-2.303nRTlog.(V_(2))/(V_(1))`
`=-2.303xx0.75xx8.314xx300log.(25)/(15)=-955.5J`
For isothermal expansion of an ideal gas `DeltaU=0`
`therefore DeltaU=q+w` gives `q=-w=+955.5J`
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