Governed by a highly symmetric cubic equation, the Clebsch was selected for a remarkable property: There are supposed to be exactly 27 straight lines that lie flush to its surface.

One is to solve an acentric-dependent cubic equation of state and the other is to use a generalized vapor pressure equation. Both methods are lengthy and tedious procedures.

A new cubic molecular-based equation of state (MMM) accurately calculates pressure, volume, temperature (PVT) and vapor-liquid equilibrium (VLE) data for pure and mixed fluids. Comparisons to the ...