Non-equilibrium thermodynamics of electro-osmosis of liquid mixtures. Studies on acetone + water mixtures

Abstract

Electro-osmosis of acetone + water mixtures through a Pyrex sintered glass membrane (porosity G-4) has been studied, and the data analysed using non-equilibrium thermodynamics. The validity of the linear phenomenological equations and Onsager's reciprocal relations, for all the compositions of the mixture, has been demonstrated. The concentration dependence of the phenomenological coefficients has been shown to be in conformity with Spiegler's frictional model. The data have also been utilised to calculate the efficiencies of electrokinetic energy conversion for both electro-osmosis and streaming potential, and the results obtained shown to be in accordance with the thermodynamic theories.