The highest pressure of phase equilibrium
of Vapour Liquid Equilibrium (VLE) curve in a pure substance (see Fig. 1). LaTeX Math Inline body p_c
It is a material property of a pure substance.
See also
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Natural Science / Physics / Thermodynamics / Thermodynamic system / Real Gas / Critical Point
[ Pure Substance ][ Сritical Temperature Tc ]
[ Pseudo-Critical Pressure (Ppc) ]