Speed of sound and densities of binary mixtures of 1-chlorobutane with tolune have been carried out at 303 K and 313K. Using the measured values of ultrasonic velocity and density acoustical parameters and their excess values, excess adiabatic compressibility ( E ad b ), excess volume ( E a V ) and excess ultrasonic velocity (U E ) are evaluated. From the properties of these excess parameters the nature and strength of the interactions in these binary systems are discussed.
