Acoustical Properties of Binary Mixture of Dehpa With Cyclohexane at Different Temperatures

Ultrasonic speed and density have been measured at 303 K-318 K in binary system (di-(2-ethyl hexyl) phosphoric acid) of dehpa with cyclohexane over entire composition range. The acoustical parameters such as adiabatic compressibility (K_s), free length (L_f), acoustic impedance (Z), relative association (R_A), Wada's constant (W), molar volume (V), interaction parameter (χ) and also excess parameters such as excess adiabatic compressibility (K^E_s), excess velocity (C_E), excess free length L^E_f, excess molar volume (V^E) and excess acoustic impedance (Z^E) are computed for the binary mixture at different temperatures. The results are interpreted in terms of molecular interaction between the components of the mixture. Observed excess values indicate that weak dipole-induced dipole interactions with predominant dispersive type interactions prevailing in the system. The ultrasonic velocities calculated using various theoretical models and validity of these theoretical relations have been discussed in the present system.