Pressure Effect on VLE

Organized by textbook: learncheme.com/
Describes how vapor and liquid compositions change for a binary mixture as the pressure changes. Made by faculty at the University of Colorado Boulder, Department of Chemical and Biological Engineering. Reviewed by faculty from other academic institutions. Check out our Thermodynamics playlists: www.youtube.co...

[@LearnChemE]

This screencast has been reviewed by faculty from other academic institutions.

[@suyadi3136]

thank you

[@MrCooldude4172]

Thank you! I just have a few questions. When the P is below the dew point there is only V and no L? Also is this the same for when P > bubble point so there is only L and no V. Also, what does this mean for the other species since Xa = 1 - Xb and if Xb = 0 does Xa = 1? Thanks.

[@LearnChemE]

Yes. You are on it. For two species in VLE, a pressure below the dew point means all vapor, and pressure above the bubble point means all liquid. If you have two species and one is 0%, the other must be 100%.

[@MrCooldude4172]

LearnChemE Thankd do Xa = 1-Xb (or with y) still works even if there is all vapour or all liquid?