Liquid diffusivities for the system methanol–toluene

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Abstract
Measurements of the liquid diffusivities over the complete range of compositions of the methanol–toluene system at atmospheric pressure and 25°C have been carried out using the magnetically stirred porous diaphragm cell technique. Diffusivities calculated on the usual basis of concentration as driving force have a minimum of 0.80 × 10−5 cm2 s−1 at 0.4 mole fraction methanol. There is a threefold variation of diffusivity over the entire composition range, and the general behavior is similar to analogous nonideal systems. At infinite dilution none of the semi-empirical correlations, based on various models of the liquid state, give values in agreement with experiment.