Investigation of ultrasonic velocity and related thermo-acoustic parameters in ternary liquid mixture containing DEHPA + benzene + toluene at different temperatures

Manaswini Mishra1, Upendra Nat

Abstract

The measurements of ultrasonic velocity (U) and density (r) of the ternary mixture of Di-(2-ethyl- hexyl phosphoric acid), Benzene and Toluene are carried out for entire range of compositions of the mixtures at 298.15K – 313.15K and used to evaluate thermodynamic parameter such as isentropic compressibility (Ks) Intermolecular free length (Lf), acoustic impedance (Z), molar volume (Vm), Wada’s Constant (W) and Rao’s constant (R). Excess thermodynamic parameters, such as excess isentropic compressibility (DKs), excess free length (DLf), excess acoustic impendence (DZ) and excess velocity (DU) have been computed. The ultrasonic velocity has been calculated using various theoretical model and these theoretical relations have been discussed in the present system.