Calculation of excess Gibbs energy of activation for viscous flow in (ionic liquid+co-solvent)

2017 ◽  
Vol 108 ◽  
pp. 143-144 ◽  
Author(s):  
Mark P. Heitz
Keyword(s):  
Ionic Liquid ◽  
Gibbs Energy ◽  
Viscous Flow ◽  
Excess Gibbs Energy ◽  
Energy Of Activation ◽  
Gibbs Energy Of Activation

Thermodynamics of Viscous Flow in Ethane-1,2-diol+Water Binary Mixtures

1995 ◽  
Vol 48 (1) ◽  
pp. 103 ◽  
Author(s):  
F Corradini ◽  
A Marchetti ◽  
M Tagliazucchi ◽  
L Tassi ◽  
G Tosi
Keyword(s):  
Molecular Dynamics ◽  
Gibbs Energy ◽  
Viscous Flow ◽  
Molecular Interactions ◽  
Excess Gibbs Energy ◽  
Thermodynamic Temperature ◽  
Empirical Equations ◽  
Excess Function ◽  
Pure Species ◽  
Gibbs Energy Of Activation

Kinematic viscosities (v) of pure ethane-1,2-diol (component 1) and of nine mixtures with water (component 2) were measured at 19 temperatures ranging from -10 to +80°C, and for binary compositions covering the whole miscibility field expressed by the relation 0 ≤ X1 ≤ 1. The property fitted some empirical equations in terms of the dependences v = v(T) and v(X1), where T is the thermodynamic temperature and X1 is the mole fraction of ethane-1,2-diol. Furthermore, the excess function (vE) and the excess Gibbs energy of activation of viscous flow (∆G*E) have been investigated. The trend of vE against binary composition of the mixtures shows negative deviations from ideal behaviour, while the contrary is true for ∆G*E The results indicate specific molecular interactions between the components, and an overview is given on the basis of the molecular dynamics of the pure species.

Thermodynamic Interactions in Binary Mixtures of 2-Methoxyethanol with Alkyl and Aryl Esters at 298.15, 303.15 and 308.15 K

1993 ◽  
Vol 58 (8) ◽  
pp. 1761-1776 ◽  
Author(s):  
Tejraj M. Aminabhavi ◽  
Shrinivas K. Raikar
Keyword(s):  
Gibbs Energy ◽  
Excess Gibbs Energy ◽  
Excess Volume ◽  
Isentropic Compressibility ◽  
Standard Errors ◽  
Refractive Indices ◽  
Excess Viscosity ◽  
Quadratic Equations ◽  
Gibbs Energy Of Activation ◽  
Excess Isentropic Compressibility

Densities, viscosities, refractive indices, and sound velocities of 2-methoxyethanol + ester mixtures have been measured at 298.15, 303.15 and 308.15 K. These data have been used to calculate excess volume, excess isentropic compressibility, excess refraction, excess viscosity and excess Gibbs energy of activation of flow. These quantities have been fitted to quadratic equations to estimate the parameters and standard errors. The results have been interpreted in term of the intermolecular interactions between the mixing components.

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