| The generalized relationships of Lee and Kesler for the thermodynamic properties of nonpolar fluids have been extended to polar fluids with the addition of polar correction terms. An accurate equation of state of water by Keenan et al. for reduced temperatures from 0.44 to 2.5 and reduced pressures to 10.0 is utilized as to establish these polar correction terms.; The input data required are the critical temperature, critical pressure, acentric factor and a polarity factor Y obtained from experimental pressure-volume-temperature data. For polar fluids, the error of calculation of the compressibility factor decreases from as high as 18% with the nonpolar relationships to less than 2% when the polar corrections are introduced. Good agreement is also obtained for derived thermodynamic properties, including fugacity coefficients and enthalpy departure.; A modified procedure obtained by introducing quadratic terms in the acentric factor, (omega) is presented for the compressibility factors of substances with large values such as alcohols.; Tabulated values for the polar correction terms are presented for the compressibility factor, fugacity coefficient, and enthalpy, entropy, and heat capacity departures for the complete range investigated, and for the saturation region from T(,R) = 0.44 to T(,R) = 0.98.; In order to investigate mixing rules for an equation of state effectively, activity coefficients at infinite dilution for the polar fluids acetone, methyl ethyl ketone, ethyl acetate, methyl acetate, and propanal in water were measured from approximately 35(DEGREES)C to 65(DEGREES)C by a gas chromatographic method. The carrier gas was presaturated with water vapor.; The data of the present study have been compared with the literature values of activity coefficients at infinite dilution. The temperature dependence of the experimental values has also been utilized to estimate heats of mixing at infinite dilution for the substances investigated. |
