Francisco Sánchez

Excess Gibbs free energies at seven temperatures and excess enthalpies and volumes at 298.15 K of butanone with 1-propanol or 2-propanol

Abstract Vapour pressures of butanone + 1-propanol or + 2-propanol at seven temperatures between 278.15 and 323.15 K were measured by a static method. Excess molar enthalpies and volumes were also measured at 298.15 K. Following Barkers method, the activity coefficients and the excess molar Gibbs free energies were fitted to the Wilson correlation. Mixtures containing 2-propanol show azeotropy with a minimum boiling temperature. The thermodynamic excess functions are discussed with respect to the molecular interactions and compared with those for binary mixtures containing the same alcohols with other solvents.

Excess Gibbs free energies at several temperatures and excess enthalpies and volumes at 298.15 K of butanenitrile with 2-methyl-1-propanol or 2-methyl-2-propanol

Abstract Vapour pressures of butanenitrile +2-methyl-1-propanol or +2-methyl-2-propanol at several temperatures between 278.15 and 323.15 K were measured by a static method. Excess molar enthalpies and volumes were also measured at T = 298.15 K. Reduction of the vapour pressures to obtain activity coefficients and excess molar Gibbs free energies was carried out by fitting the vapour pressure data to the Redlich-Kister correlation according to Barkers method. Azeotropic mixtures with a minimum boiling temperature were observed over the whole temperature range, except for 2-methyl-2-propanol at T = 323.15 K.

Isothermal vapour-liquid equilibrium at eight temperatures and excess functions at 298.15 K of di-n-propylether with 1-propanol or 2-propanol

Vapour pressures of di-n-propylether + 1-propanol or + 2-propanol at eight temperatures between 278.15 and 323.15 K were measured by a static method. Excess molar enthalpies and volumes were also measured at 298.15 K. Following Barkers method, the activity coefficients and the excess molar Gibbs free energies were fitted to the Wilson equation. Azeotropic mixtures with a minimum boiling temperature were observed over the whole temperature range.

Vapour pressures of butan-1-ol with n-hexadecane between 293.18 and 323.18 K. Description of butan-1-ol + n-alkane systems by ERAS model

Abstract Banos I., Sanchez F., Perez P., Valero J. and Gracia M., 1992. Vapour pressures of butan-1-ol with n -hexadecane between 293.18 and 323.18 K. Description of butan-1-ol+ n -alkane systems by ERAS model. Fluid Phase Equilibria , 81: 165-174. Vapour pressures of butan-1-ol with n -hexadecane between 293.18 and 323.18 K were measured at about 5 K intervals by a static method. Activity coefficients were obtained by the Barker method, and molar excess Gibbs energies were fitted to a Pade 3/1. Experimental molar excess Gibbs energies, at 298.15 and 318.15 K, and molar excess volumes, at 298.15 K, of butan-1-ol + n -hexane, + n -octane, and + n -hexadecane are compared with predictions of an extended real associated solution (ERAS) model. The model reproduces acceptably the experimental curves of V E and gives a good description of the experimental results of G E at 298.15 K.

Vapour pressures at several temperatures and excess functions at 298.15 K of n-butanol + 2-methylpentane, and + 3-methylpentane

Abstract Vapour pressures of n -butanol with 2-methylpentane and 3-methylpentane between 283.15 and 313.15 K were measured at 5 K intervals by a static method. Excess enthalpies and excess volumes, at 298.15 K, were also measured. Experimental excess volumes are compared with predictions of an extended real associated solution (ERAS) model. The model reproduces qualitatively the experimental curves of V E and gives a good description of the experimental results of G E at 298.15 K.