Mixing properties of the binary mixtures of acetone, methanol, ethanol, and 2-butanone at 298.15k

Speeds of sound, densities and refractive indices of the binary mixtures containing acetone, methanol, ethanol, or 2-butanone have been measured at 298.15 K and atmospheric pressure, in the whole composition diagram, the derived excess values being determined. Parameters of analytical expressions which represent the composition dependences of excess and variation of properties are reported. Values of physical properties were compared with the results obtained by different prediction methods. The excess volumes were estimated using different applications of the Heller equation, which are depending on the refractive indices of the mixtures. A good agreement between the experimental and theoretical values both in magnitude and sign were obtained by these methods.