Table of Contents
Journal of Thermodynamics
Volume 2015, Article ID 208486, 11 pages
Research Article

Scaling Model of Low-Temperature Transport Properties for Molecular and Ionic Liquids

Department of Physics and Materials Science, Odessa National Academy of Food Technologies, Kanatnaya Street 112, Odessa 65039, Ukraine

Received 23 September 2015; Accepted 10 November 2015

Academic Editor: Mohammad Al-Nimr

Copyright © 2015 Vitaly B. Rogankov. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The universal scaling concept is applied to the low-temperature range of any liquid states and substances located between the melting () and normal boiling () points far away from the critical region. The physical reason to develop such approach is the revealed collapse of all low-temperature isotherms onto the single universal one argued by the model of fluctuational thermodynamics (FT) proposed recently by author. The pressure reduced by the molecular parameters of the effective short-range Lennard-Jones (LJ) potential depends here only on the reduced density. To demonstrate the extraordinary predictive abilities of the developed low-temperature scaling model it has been applied to the prediction of equilibrium and transport (kinetic and dynamic viscosity, self-diffusion, and thermal conductivity) properties not only for molecular liquids but also for molten organic salts termed ionic liquids (ILs). The best argument in favor of the proposed methodology is the appropriate consistency with the scarce experiments prediction of transport coefficients for ILs on the base of universal scaling function constructed for the simplest LJ-like liquid argon. The only input data of any substance for prediction are the linear approximations of -dependent density and isobaric heat capacity taken from the standard measurements at atmospheric pressure.