Table of Contents
Journal of Thermodynamics
Volume 2013, Article ID 285796, 9 pages
Research Article

Thermodynamic and Acoustic Study on Molecular Interactions in Certain Binary Liquid Systems Involving Ethyl Benzoate

1Department of Physics, G.V.P. College of Engineering (A), Visakhapatnam 530048, Andhra Pradesh, India
2Department of Physics, Andhra University, Visakhapatnam 530003, Andhra Pradesh, India
3Department of Physics, DAR College, Nuzvid 521201, Andhra Pradesh, India
4Department of Chemistry, Acharya Nagarjuna University, Guntur 522510, Andhra Pradesh, India

Received 25 November 2012; Accepted 7 February 2013

Academic Editor: Felix Sharipov

Copyright © 2013 B. Nagarjun et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Speeds of sound and density for binary mixtures of ethyl benzoate (EB) with N,N-dimethylformamide (NNDMF), N,N-dimethyl acetamide (NNDMAc), and N,N-dimethylaniline (NNDMA) were measured as a function of mole fraction at temperatures 303.15, 308.15 K, 313.15 K, and 318.15 K and atmospheric pressure. From the experimental data, adiabatic compressibility (), intermolecular free length (), and molar volume () have been computed. The excess values of the above parameters were also evaluated and discussed in light of molecular interactions. Deviation in adiabatic compressibilities and excess intermolecular free length () are found to be negative over the molefraction of ethyl benzoate indicating the presence of strong interactions between the molecules. The negative excess molar volume values are attributed to strong dipole-dipole interactions between unlike molecules in the mixtures. The binary data of , , and were correlated as a function of molefraction by using the Redlich-Kister equation.