Journal of Pure and Applied Ultrasonics

J. D. Pandey ¹, Vinay Sanguri ¹, Sunil ², Surendra Kumar ²

Affiliations
1 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
2 Department of Chemistry, Mahatma Gandhi Chitrakoot Gramodaya Vishvavidyalaya Chitrakoot, Satna-485334, IN

Abstract

For the first time ultrasonic velocity- density correlations have applied to ionic and isotopic liquids. Familiar Auerbach relation, Altenburg relation and temperature dependent correlation were employed to calculate surface tension of N-octyl-3-methyl pyridiniumtetraflouoroborate[o3mpy][BF₄] and five pairs of isotopic liquids named, H₂O-D₂O,C₆H₆-C₆D₆,C₆H₁₂-C₆D₁₂, CH₃OH-CH₃OD and C₂H₅OH-C₂H₅OD. All the correlations yield excellent results except Auerbach relation. For the applicability of this relation we have modified it. The modified Auerbach relation also gives good agreement with the experimental values of surface tension.

Keywords

Surface Tension, Ionic Liquid, Isotopic Liquid, Ultrasonic Velocity.

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J. D. Pandey ¹, K. K. Tiwari ¹, Rupali Sethi ¹, Vinay Sanguri ¹

Affiliations
1 Department of Chemistry, University of Allahabad, Allahabad, IN

Abstract

Density (ρ) and ultrasonic velocity (u) for the three binary systems viz. acetonitrile+nitromethane (System I), 1, 2- dichloroethane+toluene (System II) and 1, 2-dichloroethane+p-xylene (System III) have been measured at three different temperatures 298.15 K, 303.15 K and 308.15 K. The experimental data have been used to obtain a number of important and useful thermodynamic parameters such as isentropic compressibility (β_s), intermolecular free length (L_f), acoustic impedance (Z), excess molar volume (V^E), deviation in ultrasonic velocity (Δu), excess isentropic compressibility ((β_s^E), excess acoustic impedance (Z^E) and excess intermolecular free length (L_f^E). The results are discussed in terms of dipole-dipole interactions and hydrogen bonding.

Keywords

Ultrasonic Velocity, Isentropic Compressibility, Excess Acoustic Impedance, Dipole-Dipole Interactions, Hydrogen Bonding.

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