A 2-phase region on PT Diagram where both liquid and gas state of a Fluid Mixture share the same volume and each occupying a certain percentage of this volume (see Fig. 1).
Vapour Liquid Envelope is bounded by Bubble Point Curve and Dew Point Curve with a junction at Pseudo-Critical Point (T_{pc}, p_{pc}).
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| Fig. 1. Schematic PT Diagram with Vapour Liquid Envelope. |
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 ]
[ Dew Point Curve ][ Bubble Point Curve ]
[ Critical Point (Tc, Pc) ][ Сritical Temperature Tc ] [ Critical Pressure (pc) ][ Cricondentherm ][ Cricondenbar ]