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The mutual diffusion coefficient of methanol– n ‐hexane near the consolute point
Author(s) -
Clark W. M.,
Rowley R. L.
Publication year - 1986
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690320709
Subject(s) - spinodal , thermodynamics , non random two liquid model , chemistry , extrapolation , thermal diffusivity , critical point (mathematics) , hexane , diffusion , exponent , chromatography , phase (matter) , activity coefficient , physics , organic chemistry , aqueous solution , linguistics , philosophy , mathematical analysis , mathematics
The composition and temperature dependence of the mutual diffusion coefficient near the liquid‐liquid critical point of methanol– n ‐hexane mixtures has been determined by Gouy interferometry. The critical exponent was found to be 0.685. Constant‐temperature extrapolation to zero diffusivity located the spinodal curve. Spinodal loci calculated from the NRTL model are inconsistent with the experimentally determined values.