Temperature fit parameters for equilibrium constants

From R. Nakamura, G.J.F. Breedveld, J.M. Prausnitz, Thermodynamic Properties of Gas Mixtures Containing Common Polar and Nonpolar Components , Ind. Eng. Chem. Process Des. Dev., vl5, 4, pp557-564 (1976) 

Nakamura et al. proposed the following perturbed-hard-sphere equation of state for gas mixtures  

P- pressure, atmospheres R - gas constant,. 082056 1. atm./K mole T - temperature, Kelvins V - molar volume, 1/mole e - reduced density. b/4v 

In addition to equations for the reduced enthalpy difference and entropy difference, the following equation was presented for calculating the fugaclty coefficient of a species k in the gas mixture  

With the P, R, T, v and e terms defined earlier, the following definitions and calculations apply  

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