Study on thermodynamic properties of binary mixtures of diethyl carbonate with benzonitrile, benzaldehyde at different temperatures

The speed of sound and density in binary liquid mixture of diethyl carbonate + benzonitrile, + benzaldehyde have been determined at temperatures 298.15, 308.15 and 318.15 K over the whole composition range. The data have been utilized to estimate the excess adiabatic compressibility (β E ), excess intermolecular free length (Lf E ), excess speed of sound (u E ) at the above temperatures. The excess values have been found to be useful in estimating the strength of the interactions in the liquid mixtures.