Excess Gibbs Free Energy Model for Calculating the Viscosity of Binary Liquid Mixtures

2000 ◽  
Vol 39 (3) ◽  
pp. 849-854 ◽  
Author(s):  
Rosana J. Martins ◽  
Márcio J. E. de M. Cardoso ◽  
Oswaldo E. Barcia
Keyword(s):  
Free Energy ◽  
Gibbs Free Energy ◽  
Liquid Mixtures ◽  
Energy Model ◽  
Binary Liquid Mixtures ◽  
Excess Gibbs Free Energy ◽  
Binary Liquid ◽  
Free Energy Model

Thermodynamic Excess Functions of Binary Liquid Mixtures with Chain Association of One Component*. Part I: The Excess Gibbs Free Energy GE/RT

1976 ◽  
Vol 31 (12) ◽  
pp. 1651-1660 ◽  
Author(s):  
F. Becker ◽  
M. Kiefer ◽  
P. Rhensius ◽  
H. D. Schäfer
Keyword(s):  
Free Energy ◽  
Gibbs Free Energy ◽  
Chain Length ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Excess Gibbs Free Energy ◽  
Component Part ◽  
Excess Functions ◽  
Binary Liquid ◽  
Self Association

Abstract In this paper equilibrium models for the calculation of the excess Gibbs free energy of binary liquid mixtures are developed, the component A of which undergoes chain-forming self-association whilst the component B acts as an 'inert' solvent. It is shown that the extension of the well-known chain-association model of Mecke and Kempter, in which the probability of chain prolongation is assumed to be independent of chain length, is unable to establish satisfactory results because it does not exhibit sufficient unsymmetry. Reduction of the probability of chain growth with in-creasing chain length leads to an improved model with the geometric series replaced by the exponential series. This model, in which only two parameters are used, i. e. the equilibrium constants K for mutual solvation of A and B, and ρ for self-association of A, allows fitting of isothermal experimental GE /R T literature data on cycloalkanol-cycloalkane, alkanol-alkane, and NMF -CCl4 systems within the limits of experimental error. Compared with the two-parameter Wilson equation which gives equally small standard deviations, our equilibrium model has the advantage of allowing passage from GE to HE data and of being applicable to liquid-liquid equilibria.

Symmetrization of excess Gibbs free energy: A simple model for binary liquid mixtures

2011 ◽  
Vol 43 (3) ◽  
pp. 442-451 ◽  
Author(s):  
Aly J. Castellanos-Suárez ◽  
Máximo García-Sucre
Keyword(s):  
Free Energy ◽  
Simple Model ◽  
Gibbs Free Energy ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Excess Gibbs Free Energy ◽  
Binary Liquid

An excess Gibbs free energy model for polyelectrolyte solutions

1989 ◽  
Vol 53 ◽  
pp. 219-227 ◽  
Author(s):  
M. Nagvekar ◽  
R.P. Danner
Keyword(s):  
Free Energy ◽  
Gibbs Free Energy ◽  
Energy Model ◽  
Excess Gibbs Free Energy ◽  
Free Energy Model ◽  
Polyelectrolyte Solutions

Isobaric vapour–liquid equilibria of 1-bromobutane + chloroethane systems

1991 ◽  
Vol 69 (2) ◽  
pp. 311-314 ◽  
Author(s):  
K. Rambabu ◽  
P. Venkateswarlu ◽  
G. K. Raman ◽  
Y. V. L. Ravi Kumar
Keyword(s):  
Free Energy ◽  
Key Words ◽  
Gibbs Free Energy ◽  
Activity Coefficients ◽  
Boiling Point ◽  
Composition Range ◽  
Liquid Mixtures ◽  
Excess Gibbs Free Energy ◽  
Binary Liquid ◽  
Point Data

The boiling point data for the binary liquid mixtures of 1-bromobutane with 1,2-dichloroethane, 1,1,1-trichloroethane, and 1,1,2,2-tetrachloroethane were obtained over the entire composition range by using a standard Swietoslawski type ebulliometer at 715 Torr. The experimental t–x data were used to estimate Wilson parameters and also to calculate the equilibrium vapor compositions for these systems. These Wilson parameters were used to calculate activity coefficients and these in turn were used to compute excess Gibbs free energy. Key words: Wilson parameters, 1-bromobutane + chloroethane systems.

A quasi lattice-local composition model for the excess Gibbs free energy of liquid mixtures

1977 ◽  
Vol 1 (2) ◽  
pp. 113-135 ◽  
Author(s):  
J.H. Vera ◽  
S.G. Sayegh ◽  
G.A. Ratcliff
Keyword(s):  
Free Energy ◽  
Gibbs Free Energy ◽  
Liquid Mixtures ◽  
Excess Gibbs Free Energy ◽  
Local Composition ◽  
Local Composition Model
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