Study of molecular interactions in binary mixtures containing 2-propanol, 1, 3-diaminopropane, and 2, 5-dimethoxytetrahydrofuran using macroscopic properties of solutions at 81.5 kPa and different temperatures
کد مقاله : 1390-PHYSCHEM20
خاطره خانلرخانی *
دانشجوی دکتری
چکیده مقاله:
Densities, ρ and refractive indices ,〖 n〗_D of binary mixtures consisting of 2-propanol, 1, 3-diaminopropane, and 2, 5-dimethoxytetrahydrofuran have been measured for the whole range of composition at temperatures of (298.15, 308.15, 318.15, and 328.15) K in ambient pressure (81.5 kPa). Excess molar volumes〖 V〗_m^E, Partial excess molar volumes〖 (V^E ) ̅〗_(m,i), refractive index deviations ∆n_D , excess thermal expansion coefficient α^Eand isothermal coefficient of pressure excess molar enthalpy〖 (∂H_m^E/∂P)〗_(T,x) for mixtures were derived.〖 V〗_m^E and ∆n_D for binary mixtures were correlated with the Redlich‒Kister polynomial equation. The effect of temperature on the excess molar volumes and refractive index deviations are discussed in terms of molecular interaction between unlike molecules. Positive deviation from ideal state were recorded for excess volume in mixture of 1, 3-Diaminopropane + 2, 5-Dimethoxytetrahydrofuran and 2-Propanol + 2, 5-Dimethoxytetra-hydrofuran solution. However in mixture of 2-Propanol and 1, 3-Diaminopropane negative deviation in the high composition of 1, 3-Diaminopropane varies to positive in the dominated mole fraction of alcohol which was analyzed to interpret the molecular interactions.
کلیدواژه ها:
Binary mixtures, Density, Excess molar volumes, Refractive index, Molecular interactions
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