Ultrasonic Studies on Molecular Interaction and Their Excess Properties of Ternary Liquid Mixtures of 2-Nitroanisole and 1-Propanol in n-Hexane at Different Temperatures 303, 308 and 313k

Abstract

The behavior of liquid mixture of 2-Nitroanisole, 1-Propanol and n-Hexane as a function of temperature and composition has been investigated by measuring ultrasonic velocity in conjunction with density and viscosity at 303, 308 and 318 K for frequency 2 MHz using ultrasonic interferro meter. With the help of the measured values ultrasonic velocity (u), viscosity (η) and density (ρ), the acoustical parameters like acoustic impedance, adiabatic compressibility, free length, free volume and internal pressure has been calculated, in order to know the molecular interaction between the component in the ternary liquid mixture and the nature and strength of molecular interaction in the component of the ternary mixture, the actual values of acoustical parameters were computed in to their excess properties. Excess ultrasonic velocity (UE), excess acoustic impedance (ZE), excess intermolecular free length (\( {\text{L}}_{\rm{f}}^{\text{E}} \)) excess adiabatic compressibility (βE), excess free volume (\( {\text{V}}_{\rm{f}}^{\text{E}} \)) and excess internal pressure have been calculated for the ternary liquid mixtures containing 2-Nitroanisole, 1-Propanol in n-Hexane at various temperatures 303, 308 & 313 K at fixed frequency 2 MHz, for different concentrations ranges from 0.001 M to 0.01 M and fitted to the Redlich-Kister polynomial equation. The computed excess values were plotted against the concentration of ternary liquid of the mixture at different temperatures 303, 308 & 313 K at a fixed frequency of 2 MHz. A good agreement has been found between the experimental and calculated values of the ultrasonic velocity. The strength and the nature of the interactions between like and unlike molecules have been discussed in terms of dipole-dipole, dipole-induced dipole, induced dipole-induced dipole interaction through hydrogen bonding.