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Estimate the percentage difference between the van der Waals and perfect gas calculations for carbon dioxide...

Estimate the percentage difference between the van der Waals and perfect gas calculations for carbon dioxide undergoing a change from 2.0 bar to 60 bar at 25° C.

( Δ Gvdw- Δ Gideal)/ Δ Gideal = ______% , 2 sig. fig.

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