Volumes, heat capacities, and compressibilities of the mixtures of acetonitrile and 2-methoxyethanol

Heat capacities and speed of sound of (acetonitrile + 2-methoxyethanol) mixtures at 298.15 K and the densities of the same mixtures at T = (308.15 and 318.15) K were determined over the whole composition range. The excess of molar volume and isobaric heat capacity of the mixture, the partial molar volumes and heat capacities of both components of the mixture as well as the adiabatic and isothermal coefficients of compressibility and their excess were calculated from the obtained experimental data. The internal pressure of the examined system was also calculated. The results of investigations were analyzed and discussed. The behavior of the analyzed functions is similar to that observed in the case of the mixtures of acetonitrile with some aprotic solvents examined earlier.

► Thermal, acoustic, and volumetric properties of the (AN + 2-ME) mixtures are examined.
► 2-ME in (AN + 2-ME) mixtures behave as aprotic solvents.
► The molecular complexes of 1:1 type predominate in the (AN + 2-ME) mixtures.
► Relation of the internal pressure on the mole fraction for (AN + 2-ME) mixtures is found.