What is the physical significance of the activation energy (Ea) and the pre-exponential factor (lnAs) in the Arrhenius type-equation for viscosity of liquids, especially for organic solvents? Is it related to enthalpy of vaporization? I think it may be that there are some correlations between these two parameters, and the equation {ln(viscosity) = lnAs + Ea/RT} is more than a completely empirical equation. We must think for science, even it we do not find anything.
You may think on the dimensions' equations it may help you to find more significances.
If there relationship between the two viscosity Arrhenius parameters, it will reduce the parameters numbers in the equation ! it's a challenge if it's true?
One recent interpretation is given by Frech and Petrovsky. http://pubs.acs.org/doi/abs/10.1021/jp408899y. It depends very much on the temperature range examined, as most organic liquids eventually deviate from the Andrade (Arrhenius) T dependence as they are cooled. Angell has written extensively on "strong" (Andrade) and "fragile" ("non-Andrade") liquids.
See also Tyrrell and Harris, Diffusion in Liquids, Butterworths, 1984, p. 285 ff for criticism of activated jump theories.
You may think on the dimensions' equations it may help you to find more significances.
If there relationship between the two viscosity Arrhenius parameters, it will reduce the parameters numbers in the equation ! it's a challenge if it's true?
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