Abstract
IN previous articles1,2 we have shown that the equation describes the atmospheric pressure viscosities of many liquids with remarkable accuracy. Equation (1) was obtained from the Cohen and Turnbull relationship between the diffusion coefficient D and “the average free volume per molecule”, Vf, defined by Vf = v−v0, where v is the average volume per molecule in the liquid and v0 the van der Waals volume of the molecule3.
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