Question: Problem 3.5 Estimation of liquid diffusivity over the entire composition range. Experimental liquid-phase activity-coefficient data are given below in terms of natural log functions for

 Problem 3.5 Estimation of liquid diffusivity over the entire composition range.

Problem 3.5 Estimation of liquid diffusivity over the entire composition range. Experimental liquid-phase activity-coefficient data are given below in terms of natural log functions for ethanol(1)-benzene (2) at 45C. Estimate and plot diffusion coefficients for both components of the mixture versus composition using the equations of Vignes. The diffusivities at infinite dilution are 2.51105cm2/s for benzene and 3.4105cm2/s for ethanol. Wilson constants for the ethanol (1)/benzene(2) system at 45C are 12=0.124 and 21=0.523. Use these with the Wilson equation to predict liquid-phase activity coefficients over the composition range

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