Abstract
Consideration of constraints imposed on fugacity coefficients by the Gibbs-Duhem equation and those inherent in the Redlich-Kwong equation of state (Redlich and Kwong, 1949) and its modification by de Santis et al. (1974) indicates that Holloway's (1977) adaptation of the Redlich-Kwong equation for calculating fugacity coefficients of molecular species in gas mixtures is in error. Revised calculations using the correct equation lead to much smaller departures from ideality than those generated by Holloway.
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Gordon, T.M., Greenwood, H.J.: The reaction: dolomite+quartz+water=talc+calcite+carbon dioxide. Am. J. Sci. 268, 225–242 (1970)
Helgeson, H.C., Delany, J.M., Nesbitt, H.W., Bird, D.K.: Summary and critique of the thermodynamic properties of rock-forming minerals. Am. J. Sci. 278A, p. 67 (1978)
Holloway, J.R.: Fugacity and activity of molecular species in supercritical fluids. In: Thermodynamics in Geology (D. Faser, ed.), 161–181 (1977)
Kerrick, D.M., Jacobs, G.K.: Experimental and thermodynamic analysis of decarbonation equilibria in P-T-XCO2 space. Trans. Am. Geophys. Union 59, No. 4, p. 402 (1978)
Prausnitz, J.M.: Molecular thermodynamics of fluid-phase equilibria. p. 156 New Jersey: Prentice-Hall, 1974
Prausnitz, J.M.: oral communication (1978)
Redlich, O., Kister, A.T.: Thermodynamics of nonelectrolyte solutions, x-y-t relations in a binary system. Ind. Eng. Chem. 40, No.2, p. 342 (1948)
Redlich, O., Kwong, J.N.S.: An equation of state. Fugacities of gaseous solutions. Chem. Rev. 44, 233–244 (1949)
Santis, R. de, Breedveld, G.J.F., Prausnitz, J.M.: Thermodynamic properties of aqueous gas mixtures at advanced pressures. Ind. Eng. Chem. Process Des. Dev. 13, 374–377 (1974)
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Flowers, G.C. Correction of Holloway's (1977) adaptation of the modified Redlich-Kwong equation of state for calculation of the fugacities of molecular species in supercritical fluids of geologic interest. Contr. Mineral. and Petrol. 69, 315–318 (1979). https://doi.org/10.1007/BF00372333
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DOI: https://doi.org/10.1007/BF00372333