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Phase Equilibrium Boundary on Phase Equilibrium Diagram separating the single-phase vapour region and 2-phase liquid-vapour region on PT Diagram (see Fig. 1).

The slightest pressure drop or temperature increase results in liberation of the first bubble of vapour forming a 2-phase liquid-vapour system.

Fig. 1. Schematic PT Diagram with Vapour Liquid Equilibrium area and Cricondenbar Point.

See also

Natural Science / Physics / Thermodynamics / Thermodynamic system / Thermodynamic equilibrium / Phase Equilibrium /  Vapour Liquid Equilibrium (VLE)

State of matter ]Pure substance ] [ Mixtures ][ Fluid Mixtures ] [ Phase ]

Сritical Temperature Tc ] [ Critical Pressure (pc) ]

Bubble Point Curve ]

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