In Lee-Kesler paper "A generalized thermodynamic coorelation based on a three-parameter corresponding state" he makes refernce to a Vr = Pc*V/RTc where V is the volume of a simple fluid. what is this simple fluid?
Actually I may not have been clear before I am trying to program a spreadsheet to do Lee-Kesler calcs and I was wondering if anyone could give me some advice on how to calculate the simple fluid volume