An extension of the McAllister model to correlate kinematic viscosity of electrolyte solutions

This paper presents a new model for correlating kinematic viscosity of binary strong electrolyte solutions. The new model, based upon Eyring theory, considers that molecular interactions among anion, cation, and molecule occur in a certain way. The new equation correlates the viscosity of different aqueous electrolyte solutions within an absolute percentage error of 0.49% with a standard deviation of 0.4%. Comparison to existing correlations also appears in this work. List of symbols G* Gibbs energy of activation [J/mol] h Planck constant [6.624 x 10(-27) ergs/molecule, 6.624 x 10(-25) g mm(2)/(s molecule)] a(i) Constant of Eq. (23) b(i) Constants of Eq. (24) M Molecular weight, g/mol n Number of moles N Avogadro's number [6.023 x 10(23)] molecules/mol or number of data points in Eqs. (4) NP Number of experimental data points R Universal gas constant t Temperature, [degrees C] T Temperature [K] V Molar volumen [cm(3)/mol] x Mole fraction Greek letters delta G(ij)* Temperature dependent parameter of the new viscosity equation delta G(ji)* Temperature dependent parameter of the new viscosity equation delta G(ijk)* Temperature dependent parameter of the new viscosity equation mu Dynamic viscosity, m Pas nu Kinematic viscosity, mm(2)/s Subscripts i, j, k Species i, j, and k m Mixture mix Mixture (C) 2013 Elsevier B.V. All rights reserved.