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ISRN Physical Chemistry
Volume 2013 (2013), Article ID 612837, 13 pages
http://dx.doi.org/10.1155/2013/612837
Research Article

Thermophysical Properties of Binary Liquid Systems of Ethanoic Acid, Propanoic Acid, and Butanoic Acid with Benzene or Acetophenone

University Institute of Chemical Engineering & Technology, Panjab University, Chandigarh-160 014, India

Received 10 June 2013; Accepted 14 July 2013

Academic Editors: A. Gil-Villegas, B.-T. Liu, and G. Pellicane

Copyright © 2013 R. Ahluwalia 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.

Abstract

The density ( ), viscosity ( ), and surface tension ( ) of binary mixtures of carboxylic acids (CAs) (ethanoic acid (EA), propanoic acid (PA), butanoic acid (BA)) + benzene (BEN) or acetophenone (ACT) have been measured at 298.15, 308.15, and 318.15 K. From the experimental results, excess values of molar volume ( ), viscosity ( ), Gibb's free energy for the activation of low ( ), and surface tension ( ) were evaluated and fitted to a Redlich-Kister type of equation. The parameter “ ” of Grunberg and Nissan expression has also been calculated. From the sign and magnitude of , , , , and “ ” values, it is concluded that specific interactions are present in CA+ACT system and these interactions are absent in CA + BEN mixtures. Various viscosity and surface tension models have been used to test the consistency of the data.