This paper aims to portray the nature and extent of interaction in the binary mixture of acetone with bromobenzene and chlorobenzene by computing the various acoustic parameters such as acoustic impedance (Z), isentropic compressibility (ß), intermolecular free length (Lf) and their excess values at different frequencies (1 MHz, 3 MHz and 5 MHz) using a multi frequency ultrasonic interferometer over the entire range of mole fraction at temperature 303.16 K. The experimental data for sound velocity (C) and density (?) of the mixture have been used to compute these parameters. The variations of sound speed with frequency plays the key role to execute the variation in these parameters which is explained in terms of different intermolecular interactions present in the binary mixture. The extent of interactions existing between component molecules has been found out. In acetone-bromobenzene system the more negative values of different excess parameter suggest that the interaction between acetone-bromobenzene is more as compare to acetone-chlorobenzene system. Further a comparative study for the above acoustical parameters between two mono substituted benzene in presence of acetone at different frequencies were discussed in terms of molecular interactions.
Ultrasonic velocity, Isentropic compressibility, Intermolecular free length, Acoustic impedance