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Isothermally at 27^(@) C, one mole of a ...

Isothermally at `27^(@)` C, one mole of a van der Waals gas expands reversibly from 2 litres to 20 litres. Calculate the work done if `a =1.42 xx 10^(12)` dynes `cm^(4)` per mole and b= 30 cc.

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