Rowlinson, J. S. Physical Chemistry Laboratory, University of Oxford, Oxford, United Kingdom.
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An equation of state of gases that has additional terms beyond that for an ideal gas, which account for the interactions between the molecules. The pressure p can be expressed in terms of the molar volume Vm = V/n (where n is the number of moles of gas molecules in a volume V), the absolute temperature T, and the universal gas constant R = 8.3145 J K−1 mol−1 or, in more commonly used practical units, 0.082058 L atm K−1 mol−1 [Eq. (1)].
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