Note: The universal relations for the critical point parameters

Abstract

The universal correlation between the reduced critical pressure, density, and temperature for different substances and model systems was found on the basis of analysis of experimental and numerical simulation data. We choose the Zeno line (ZL) parameters as the reducing units (ZL is the line along which the compressibility factor is unity). In these variables the critical and ZL parameters satisfy simple relations, which are valid for a great number of substances.