The apex point of Vapour Liquid Equilibrium (VLE) area on PT diagram of Fluid Mixture (see Fig. 1).

It is characterized by critical temperature and critical pressure .

Fig. 1. Schematic PT diagram with Vapour Liquid Equilibrium and Pseudo-Critical Point (T_pc, p_pc).

The simplest estimate of Pseudo-Critical Point is the mole fraction weighted average:

T_{pc} = \sum_i x_i \, T_{c,i}

p_{pc} = \sum_i x_i \, p_{c,i}

where

	mole fraction of the -th mixture component
	critical temperature of the -th mixture component
	critical pressure of the -th mixture component

See also

Natural Science / Physics / Thermodynamics / Thermodynamic system

[ Fluid Mixture ]

[ Pseudo-Critical Point (T_pc, p_pc) ][ Pseudo-Critical Temperature (T_pc) ][ Pseudo-Critical Pressure (P_pc)]

[ Critical Point (T_c, p_c) ][ Сritical Temperature T_c ][ Critical Pressure (p_c) ]