Valid only if the species are chemically similar (size, same chemical nature e.g.

Applicable for low to moderate pressure.

10.1 вЂ“ Shows the P-T-composition surfaces of equilibrium states of saturated V & saturated L of a binary system

As pressure reduces, more & more L vaporizes until completed at W point where last drop of L (dew) disappear вЂ“ dew point: a point when a vapor forms the first droplet of liquid and begins to condense Fig.

Liquid at F, reduces pressure at constant T & composition along FG, the first bubble appear at L вЂ“ bubble point: a point when a liquid forms the first bubble of vapor and begins to evaporate.

contact to each other in a closed location.

takes place when liquid and vapor are allowed to.

e.g: mixture of liquid and vapor at an equilibrium.

Binary mixture: Mixture that contains two constituents.rate of evaporation (liquid в†’ vapor) =.A condition where a liquid phase and vapor phase.VLE: State of coexistence of L & V phases.

The T, P, composition reaches final value which will remain fixed: equilibrium THE NATURE OF EQUILIBRIUM Equilibrium : A static condition in which no changes occur in the macroscopic properties of a system with time. Measures of composition VLE : Qualitative behavior Simple Models for VLE - RaoultвЂ™s Law - Dewpoint& Bubblepoint Calculations with RaoultвЂ™s Law - HenryвЂ™s Law VLE by modified RaoultвЂ™s law VLE from K-value correlations.PTT 201/4THERMODYNAMICS SEM 1 (2013/2014) Vapor/Liquid Equilibrium (VLE) Solution Thermodynamic:Д¬hapter Outline (Smith) Nature of Equilibrium

Depriester chart in kpa