DENSITIES, REFRACTIVE-INDEXES, AND DERIVED EXCESS PROPERTIES OF THE SYSTEM METHYL ACETATE PLUS METHANOL PLUS 2-BUTANOL AT 298.15 K

This work reports the experimental results of the densities and refrac tive indices of the ternary system methyl acetate + methanol + 2-butan ol and the corresponding binary systems methyl acetate + a-butanol and methanol + a-butanol at 298.15 K and atmospheric pressure. A vibratin g tube digital densimeter and a refractometer of synthetic sapphire pr ism (sodium D wavelength) were used, the whole mole fraction range bei ng covered. Excess molar volumes and changes of refractive index on mi xing were determined from experimental data, and different estimation equations that are dependent of binary contributions were analyzed. Va riable-degree polynomials have been fitted to the results. Values of d ensities and refractive indices are evaluated and compared by differen t methods. Excess partial molar volumes and those corresponding to the infinite dilution condition are also calculated.