Studies on solution properties of ternary mixture of acetophenone + n-amyl alcohol + dichloromethane and its corresponding binaries at 298.15 K

Abstract

The excess values of molar volume (V ^E), viscosity deviation (Δη), deviation in isentropic compressibility (ΔK_S ), excess molar refraction (ΔR) and excess Gibbs energy of activation (ΔG^*E ) of viscous flow have been investigated from the experimentally measured densities, viscosities, sound speeds and refractive indices for three binary mixtures of acetophenone + n-amyl alcohol, acetophenone + dichloromethane and n-amyl alcohol + dichloromethane and their corresponding ternary mixtures at 298.15 K over the entire composition range. The calculated quantities are further fitted to the Redlich–Kister equation to estimate the binary fitting parameters and standard deviations from the regression lines. The excess or deviation properties were found to be either negative or positive depending on the molecular interactions and the nature of liquid mixtures and have been discussed in terms of molecular interactions and structural changes.

Keywords:

• viscosity deviations
• excess molar volumes
• isentropic compressibilities
• excess molar refraction

Acknowledgements

The authors are grateful to the Departmental Special Assistance Scheme under the University Grants Commission, New Delhi (no. 540/6/DRS/2007, SAP-2) for financial support.