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Received September 9, 2013
Accepted November 6, 2013
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Volumetric, ultrasonic and viscometric studies of binary liquid mixures of N-ethylaniline + chlorobenzene, + Bromobeneze, + 1, 2-dichlorobenzene +1, 3-dichlorobenzene+1, 2, 4-trichlorobenzene at 303.15 and 308.15K

Department of Chemistry, Acharya Nagarjuna University, Guntur-522510, AP, India 1Department of Chemistry, J.K.C. College, Guntur-522006, AP, India
rbchintala@gmail.com
Korean Journal of Chemical Engineering, May 2014, 31(5), 881-895(15), 10.1007/s11814-013-0235-0
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Abstract

We measured densities (ρ), ultrasonic speeds (u) and viscosities (η) for binary binary mixtures of N-ethylaniline (N-EA) with chlorobenzene (CB), bromobenzene (BB), 1,2-dichlorobenzene (1,2-DCB), 1,3-dichlorobenzene (1,3-DCB), and 1,2,4-trichlorobenzene (1,2,4-TCB) and their pure liquids at 303.15 K and 308.15 K. These experimental data were used to calculate the excess volume (VE), deviations in ultrasonic speeds (Δu), deviation in isentropic compressibility_x000D_ (Δκs), deviation in intermolecular free length (ΔLf), deviation in acoustic impedance (ΔZ), deviation in viscosity (Δη) and excess Gibbs free energy of activation of viscous flow (G*E). The variations of these properties with composition of binary mixtures suggest loss of dipolar association, difference in size and shape of the component molecules, dipole-dipole interactions and hydrogen bonding between unlike molecules. The viscosity data were correlated with_x000D_ Grunberg and Nissan, Katti and Chaudhri, and Hind et al. equations and the results were compared with the experimental results. The excess parameters were fitted to the Redlich-Kister polynomial equation using multi parametric nonlinear regression analysis to derive the binary coefficients and to estimate the standard deviation.

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