Thermodynamic parameters modeling of viscous flow activation in ethylene glycol-water fluid systems

Document Type: Research Article


1 Université de Tunis El Manar, Laboratoire de Biophysique et Technologies Médicales, LR13ES07, Institut Supérieur des Technologies Médicales de Tunis, 9 Avenue Dr. Zouhaier Essafi 1006 Tunis, Tunisia.

2 University of Carthage, Thermal Processes Laboratory (LPT), Research and Technology Center of Energy (CRTEn), Borj Cedria, B.P N°95 - 2050 Hammam-Lif - Tunisia

3 Department of Thermodynamics, Faculty of Pharmacy, University of Valencia, Burjassot (Valencia) 46100, Spain.

4 Department of Chemistry, University of Chittagong, Chittagong-4331, Bangladesh.

5 Department of Physics,K L University

6 Department of Chemistry, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia


Calculation of excess quantities of ethylene glycol + water binary fluid systems at seven absolute temperatures (293.15 to 353.15) K from experimentally determined values of density and shear viscosity were presented in previous work. The examination of related functions beside the quality of correlation from several equations on these experimental values has also been reported. Considering the quasi-equality between Arrhenius activation energy of viscosity Ea and the enthalpy of activation for viscous flow H*, over with their individual's contribution separately we can define partial molar activation energy Ea1 and Ea2 for ethylene glycol with water respectively. Correlation between Arrhenius parameters also shows desirable Arrhenius temperature. Comparison to the vaporization temperature in the fluid vapor equilibrium, and the limiting corresponding partial quantities permit us to predict value of the boiling points of the pure constituents. New empirical equations to estimate the boiling point are developed.


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