Combining rules: Difference between revisions

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The '''combining rules''' (also known as ''mixing rules'') for binary [[mixtures]]  are variously given by
The '''combining rules''' (also known as ''mixing rules'') for binary [[mixtures]]  are variously given by
====Admur and Mason====
For the [[second virial coefficient]] of a mixture
<ref>[http://dx.doi.org/10.1063/1.1724353 I. Amdur and E. A. Mason "Properties of Gases at Very High Temperatures",  Physics of Fluids '''1''' pp. 370-383 (1958)]</ref>
:<math>B_{ij} = \frac{\left(B_{ii}^{1/3}+B_{jj}^{1/3}\right)^3}{8}</math>
====Berthelot rule====
====Berthelot rule====
:<math>\epsilon_{ij} = \sqrt{\epsilon_{ii} \epsilon_{jj}}</math>
:<math>\epsilon_{ij} = \sqrt{\epsilon_{ii} \epsilon_{jj}}</math>
====Hudson and McCoubrey====
<ref>[http://dx.doi.org/10.1039/TF9605600761 G. H. Hudson and J. C. McCoubrey "Intermolecular forces between unlike molecules. A more complete form of the combining rules", Transactions of the Faraday Society '''56''' pp.  761-766 (1960)]</ref>
====Kong rules====
<ref>[http://dx.doi.org/10.1063/1.1680358 Chang Lyoul Kong "Combining rules for intermolecular potential parameters. II. Rules for the Lennard-Jones (12–6) potential and the Morse potential", Journal of Chemical Physics '''59''' pp. 2464-2467 (1973)]</ref>
====Lorentz rule====
====Lorentz rule====
:<math>\sigma_{ij} = \frac{\sigma_{ii} + \sigma_{jj}}{2}</math>
:<math>\sigma_{ij} = \frac{\sigma_{ii} + \sigma_{jj}}{2}</math>
See also [[Lennard-Jones model]]
See also [[Lennard-Jones model]]
====Kong rules====
====Tang and Toennies====
<ref>[http://dx.doi.org/10.1063/1.1680358 Chang Lyoul Kong "Combining rules for intermolecular potential parameters. II. Rules for the Lennard-Jones (12–6) potential and the Morse potential", Journal of Chemical Physics '''59''' pp. 2464-2467 (1973)]</ref>
<ref>[http://dx.doi.org/10.1007/BF01384663 K. T. Tang and J. Peter Toennies "New combining rules for well parameters and shapes of the van der Waals potential of mixed rare gas systems", Zeitschrift für Physik D Atoms, Molecules and Clusters '''1''' pp. 91-101 (1986)]</ref>
====Waldman-Hagler rules====
====Waldman-Hagler rules====
<ref>[http://dx.doi.org/10.1002/jcc.540140909 M. Waldman and A. T. Hagler "New combining rules for rare-gas Van der-Waals parameters", Journal of Computational Chemistry '''14''' pp.  1077-1084 (1993)]</ref>
<ref>[http://dx.doi.org/10.1002/jcc.540140909 M. Waldman and A. T. Hagler "New combining rules for rare-gas Van der-Waals parameters", Journal of Computational Chemistry '''14''' pp.  1077-1084 (1993)]</ref>
====Admur and Mason====
For the [[second virial coefficient]] of a mixture
<ref>[http://dx.doi.org/10.1063/1.1724353 I. Amdur and E. A. Mason "Properties of Gases at Very High Temperatures",  Physics of Fluids '''1''' pp. 370-383 (1958)]</ref>
:<math>B_{ij} = \frac{\left(B_{ii}^{1/3}+B_{jj}^{1/3}\right)^3}{8}</math>
====Hudson and McCoubrey====
<ref>[http://dx.doi.org/10.1039/TF9605600761 G. H. Hudson and J. C. McCoubrey "Intermolecular forces between unlike molecules. A more complete form of the combining rules", Transactions of the Faraday Society '''56''' pp.  761-766 (1960)]</ref>
==References==
==References==
<references/>
<references/>

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The combining rules (also known as mixing rules) for binary mixtures are variously given by

Admur and Mason

For the second virial coefficient of a mixture [1]

Berthelot rule

Hudson and McCoubrey

[2]

Kong rules

[3]

Lorentz rule

See also Lennard-Jones model

Tang and Toennies

[4]

Waldman-Hagler rules

[5]

References

Related reading