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4 moles of a van dr Walls'gas is subject...

4 moles of a van dr Walls'gas is subjected to 3 Kj of hrat in a closed rigid vessel of volume 20.2 L causing an increase in temperature from 300 K to 400 K. Calculate the value of `DeltaH` (inJ) for the above change
[Given data : `R=0.08 L` bar `"mole"^(-)K^(-1),a=2 L^(2)` bar `mol^(-2),b=0.05L"mole"^(-1)`]

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