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Original Articles

Ultrasonic velocities, isentropic compressibilities and excess molar volumes of octan-1-ol with chloroform, 1,2-dichloroethane and 1,1,2,2-tetrachloroethane at 298.15 and 308.15 K

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Pages 199-230 | Received 16 Nov 2007, Accepted 25 Jan 2009, Published online: 14 Apr 2010
 

Abstract

Densities (ρ), and ultrasonic velocities (u) of binary mixtures of octan-1-ol with chloroform, 1,2-dichloroethane, and 1,1,2,2-tetrachloroethane (TCE) have been measured over the entire range of composition at 298.15 and 308.15 K and at atmospheric pressure. From the experimental values of density and ultrasonic velocity, the excess molar volumes (V E), deviations in ultrasonic velocity (Δu), intermolecular free lengths (L f), mean molecular radii (r), molar sound velocities (Rm ), acoustic impedances (Z), excess isentropic compressibilities (), excess intermolecular free lengths () and excess acoustic impedances (Z E) have been calculated. These excess functions have been fitted to the Redlich–Kister polynomial equation to derive the binary coefficients and the standard errors between the experimental and the calculated quantities. The experimental ultrasonic velocities have been analysed in terms of Nomoto (N), Van Dael (VD), Jacobson's free length theory, Schaaffs collision factor theory and thermoacoustical parameters.

Acknowledgements

The authors are grateful to the Kurukshetra University authorities for providing the necessary facilities to carry out the research work.

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