Debye−Hückel Model for Calculating the Viscosity of Binary Strong Electrolyte Solutions at Different Temperatures

• Published in: Industrial & engineering chemistry research 2002-10, Vol.41 (20), p.5109-5113
• Main Authors: Esteves, Manoel J. C, Cardoso, Márcio J. E. de M, Barcia, Oswaldo E
• Format: Article
• Language: English
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; Solution properties; Solutions
• ISSN: 0888-5885; 1520-5045
• DOI: 10.1021/ie020260k

In the present article, a recently published model (Esteves, M. J. C.; Cardoso, M. J. E. de M.; Barcia, O. E. Ind. Eng. Chem. Res. 2001, 40, 5021) for calculating the viscosity of binary strong electrolyte solutions, at 25 °C and 0.1 MPa, has been extended for calculating the viscosity of binary strong electrolyte solutions at different temperatures. A temperature dependence has been introduced into the two adjustable parameters of the original model. The empirical expression originally proposed by Silvester and Pitzer (J. Phys. Chem. 1977, 81, 1822) to take into account the temperature dependence of thermodynamic properties of aqueous electrolyte solutions has been adopted. The proposed model contains a total of five adjustable parameters that have been fitted by means of experimental viscosity data in the literature. The total number of 20 binary electrolyte systems (at 0.1 MPa and in the temperature range of −35 to 55 °C) with two different solvents (water and methanol) have been studied. The overall average mean relative standard deviation is 0.98%