Thermoacoustic Properties of Binary Liquid Mixtures of Sulfolane with Aniline, N,N-Dimethylaniline and N,N-Diethylaniline at Different Temperatures and Atmospheric Pressure

Densities and sound velocities of the binary liquid mixtures of sulfolane + aniline, sulfolane + N,N-dimethylaniline, sulfolane + N,N-diethylaniline over the whole range of composition and their pure component were measured at temperatures (T = 303.15, 308.15, 313.15 K) and atmospheric pressure. A high precision vibrating-tube densitometer was used for the measurements. From the measured values, excess adiabatic compressibility (βs^E), excess sound velocity (u^E), excess internal pressure (Pi^E) and deviation of surface tension (∆γ) were calculated for each of the systems. The excess properties and surface tension deviation were fitted to the Redlich-Kister equation. All these properties have been discussed in terms of molecular interactions.