EXCESS THERMODYNAMIC PARAMETERS OF BINARY MIXTURES OF METHANOL, ETHANOL, 1-PROPANOL AND 2-BUTANOL + CHLOROFORM AT 288.15-323.15 K AND COMPARISON WITH THE FLORY THEORY

摘要

In this work we used the experimental result for calculating the thermal expansion coefficients a, and their excess values aE, and isothermal coefficient of pressure excess molar enthalpy and comparison the obtain results with Flory theory of liquid mixtures for the binary mixtures {methanol, ethanol, 1-propanol and 2-butanol + chloroform} at 288.15, 293.15, 298.15, 303.15, 308.15, 313.15, 318.15 and 323.15 К. The excess thermal expansion coefficients α~E and the isothermal coefficient of pressure excess molar enthalpy (дH_m~E/θР)T.x for binary mixtures of {methanol and ethanol + chloroform} are S-shaped and for binary mixtures of { 1-propanol and 2-butanol + chloroform} are positive over the mole fraction. The isothermal coefficient of pressure excess molar enthalpy (дНm/ДР)T.x, are negative over the mole fraction range for binary mixture of { 1-propanol and 2-butanol + chloroform}. The calculated values by using the Flory theory of liquid mixture show a good agreement between the theory and experimental.