In the evaluation of thermodynamic measurements of mixtures a development of the excess Gibbs free energy, Ai@, in orthogonal functions has proved advantageous. Since measurements do not give a smooth curve but a set of discontinuous values, a method appropriate for the evaluation of equidistant dis
Thermodynamic evaluation of binary vapour-liquid equilibria
β Scribed by H.A.C. Thijssen
- Publisher
- Elsevier Science
- Year
- 1955
- Tongue
- English
- Weight
- 445 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0009-2509
No coin nor oath required. For personal study only.
β¦ Synopsis
An exact graphical method for the evaluation of vapour-liquid equilibrium data in a binary mixture from boiling point composition data is described. The variation of the activity coefficients with composition is obtained by successive application of the exact Duhem equation to a graph relating ln yr, and In ya with z as parameter. Purther, the test for internal consistency of vapour-liquid equilibrium data as introduced by HARINGT~N is extended to p constant, T variable and corrected for nonideality of the vapour phase. The methods are applied to vapourliquid equilibrium data of the binary system methylryclohexane-toluene. Rkrmd--L'auteur d&it une mdthode graphique exacte pour verifier a partir de la courbe d'ebullition d'un melange binaire, les donnees de l'equilibre liquide-vapeur. 11 obtient la variation des coefficients d'activite avec la composition par application de la forme exacte de l'dquation de 'DUHEM B un graphique reliant In yr et In ys avec x commr paramtim. En outres, il &end le test introduit par HARINGTON qui apprdcie la qua1it.d intrinkque des don&s de l'dquilibre liquide vapeur, ir p constant et T variable et le corrige dans le cas de non id&lit6 de la phase vapeur. 11 applique cette methode aux don&es de l'equilibre liquide-vapeur du systeme binaire methyl-cyrlohexane -tolu&ne.
π SIMILAR VOLUMES
The application of rigorous thermodynamic methods allows the calculation of vapourliquid equilibrium data for binary systems from measurements of the total vapour pressures exerted by the liquid phase. Of the methods known, integration of the coexistence equation is considered most convenient. Exact
The vapour-liquid equilibria of the binary systems perfluoromethylcyclohexane-pentafluorobenzene, benzene-pentafluorobenzene, benzene-methylperfluorobutanoate and perfluoromethylcyclohexane-methylperfluorobutanoate have been measured at 333.07 K and 343.12 K using a dynamic circulation still of the