# Statistical thermodynamics of liquid mixtures: A new expression for the excess Gibbs energy of partly or completely miscible systems

@article{Abrams1975StatisticalTO, title={Statistical thermodynamics of liquid mixtures: A new expression for the excess Gibbs energy of partly or completely miscible systems}, author={Denis S. Abrams and John M. Prausnitz}, journal={Aiche Journal}, year={1975}, volume={21}, pages={116-128} }

To obtain a semi-theoretical equation for the excess Gibbs energy of a liquid mixture, Guggenheim's quasi-chemical analysis is generalized through introduction of the local area fraction as the primary concentration variable. The resulting universal quasi-chemical (UNIQUAC) equation uses only two adjustable parameters per binary. Extension to multicomponent systems requires no ternary (or higher) parameters.
The UNIQUAC equation gives good representation of both vapor-liquid and liquid…

## 3,760 Citations

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

- Chemistry
- 1977

### A modification of the Wilson equation with only binary parameters for ternary liquid—liquid equilibria

- Chemistry
- 1994

### Calculation of liquid-liquid equilibrium of aqueous two-phase systems using a chemical-theory-based excess Gibbs energy model

- Chemistry
- 2004

Abstract - Mixtures containing compounds that undergo hydrogen bonding show large deviations from ideal behavior. These deviations can be accounted for through chemical theory, according to which the…

### Excess molar enthalpies of binary and ternary systems involving hydrocarbons and ethers

- Chemistry
- 2010

In modern separation design, an important part of many
phase-equilibrium calculations is the mathematical representation
of pure-component and mixture enthalpies. Mixture enthalpy data are
important…

### Ethylene Glycol and Its Mixtures with Water and Electrolytes: Thermodynamic and Transport Properties

- Chemistry
- 2013

A comprehensive thermodynamic model has been developed for calculating thermodynamic and transport properties of mixtures containing monoethylene glycol (MEG), water, and inorganic salts and gases.…

## References

SHOWING 1-10 OF 32 REFERENCES

### LOCAL COMPOSITIONS IN THERMODYNAMIC EXCESS FUNCTIONS FOR LIQUID MIXTURES

- Chemistry
- 1968

A critical discussion is given of the use of local compositions for representation of excess Gibbs energies of liquid mixtures. A new equation is derived, based on Scott's two-liquid model and on an…

### Estimation of ternary vapor‐liquid equilibrium

- Chemistry
- 1955

Isothermal vapor-liquid equilibrium measurements were made at 50°C. for the ternary systems acetone-methanol-chloroform, acetone-methanol-carbon tetrachloride, and acetone-methanol-methyl acetate, by…

### L'équation NRTL pour le calcul des équilibres liquide‐liquide à n‐constituants

- Chemistry
- 1970

We propose a new method for the application of the NRTL equation(1) to the representation of phase equilibria, especially between two liquid phases, of multicomponent mixtures including polar…

### The entropy of high polymer solutions. Generalization of formulae

- Chemistry
- 1950

The theory of Huggins is extended so as to include application to molecules containing rings and crosslinks. At the same time the definition of Guggenheim's parameter q is slightly revised in such a…

### Cooperative Orientation Effects in Solutions

- Chemistry
- 1952

A general theoretical method for evaluating the effect on thermodynamic properties of cooperative orientation in solutions is developed. The theory is applied to the systems methanol+benzene,…

### Derivation of the three-parameter Wilson equation for the excess Gibbs energy of liquid mixtures

- Chemistry
- 1969