Thermodynamics of Mixtures Containing Polar Liquids

Abstract

c 250 (1965). ip = tortuosity factor, defined by eq 26 380 (1971). V = kinematic viscosity, cm*/sec q p~ pp Pt= energy dissipation rate in slurry per unit mass of = porosity of carbon particles = eddy size, defined by eq 18 = density of particle-free liquid, g/cma = density of carbon particles, g/cma = density of solid Phase, true density, of carbon Par-particle-free liquid, ergs/(g sec)The partition function for polar liquids i s extended to mixtures using Scott's two-fluid theory. The resulting expressions for the excess functions are tested against data for ten polar-polar and ten polar-nonpolar systems. One empirical mixture parameter i s required for each system. Its value is set using an excess enthalpy datum. Good representation of the entire excess enthalpy and volume curves is found for most systems, including those which are "cubic" in appearance. Excess entropy predictions are nearly always too high due to the degree of disorder assumed in the model.

Thermodynamics of molecular interactions between nitromethane and aromatic hydrocarbons

“…where and All the quantities in eqs. [4] to [8] have the same significance as suggested by Winnick and Prausnitz (3,26). V" GGE, and H\ according to this theory, were calculated from the following expressions [lo] compare reasonably well with the corresponding experimental values.…”

“…We next examined our VE, HE, and GE data for Winnick theory (26). Based on a configurational partition function (27) of a pure liquid suggested by cell theory, Winnick (26) expressed the configurational partition function for a polar-non-polar mixture of mole fraction x, by the expression…”

Excess Volumes of Mixtures Containing Polar Liquids

“…The results were compared with predictions made using a partition function developed earlier. Good comparisons are achieved if the arithmetic-mean unlike diameter of interaction is adjusted with a single, composition-independent parameter.A partition function for mixtures containing polar liquids was recently reported (Winnick, 1973). It was shown to give reasonably good representations of the excess enthalpy for several polar-polar and polar-nonpolar systems, utilizing only one empirical parameter, the correction to the unlike energy of interaction.…”

“…The excess volumes predicted were, however, not generally in quantitative agreement.Buff and Schindler (1958) and more recently Soares, et al (1972), have utilized a second empirical correction to the arithmetic-mean unlike diameterwith some success for simple nonpolar liquid mixtures. This same approach was thus tested for the mixtures treated with the polar fluid partition function (Winnick, 1973).…”

“…A partition function for mixtures containing polar liquids was recently reported (Winnick, 1973). It was shown to give reasonably good representations of the excess enthalpy for several polar-polar and polar-nonpolar systems, utilizing only one empirical parameter, the correction to the unlike energy of interaction.…”