Informatics Publishing Limited

Narayani Prasad ¹, R. P. K. Ray ², Manoj Kumar ²

Affiliations
1 Department of Biochemistry, F.B.S. and H., R.A.U, Pusa, Samastipur-848125, IN
2 Department of Physics, F.B.S. and H., R.A.U, Pusa, Samastipur-848125, IN

Abstract

Triethyl amineas well as methanol and ethanol are important aliphatic organic amino compound, which draw their importance as excellent solvents. The densities (ρ) and ultrasonic velocities (u) of binary mixtures of triethyl amine with methanol and ethanol have been determined experimentally at 298.15K, 303.15K and 308.15K respectively. Isentropic compressibility, intermolecular free length, molar volume, available volume and free volume have been computed utilizing these experimental data. The nonlinear variation of these parameters shows the presence of interaction and their excess values is indicative of interaction between the components molecules in both systems.

Keywords

Ultrasonic Velocity, Binary Mixtures of Triethylamine With Alcohols, Compressibility, Molecular Interaction.

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N. Prasad ¹, R. P. K. Ray ¹

Affiliations
1 Department of Biochemistry, Department of Physics, F.B.S. & H., Rajendra Agricultural University, Pusa-848125, Samastipur, Bihar, IN

Abstract

Ultrasonic velocity, density and viscosity have been determined experimentally and free volume as well as internal pressure were computed for the binary mixtures of n. butanol with aniline, N-methylaniline and N, N-dimethylaniline. Excess values of viscosity, free volume and internal pressure were also deduced for these systems. The results have been discussed in the light of existing theories of molecular interaction involved and chemical constitution of the liquid components.

Keywords

Ultrasonic Velocity, Free Volume, Internal Pressure, Depolymerisation, Cohesive Forces, Aromatic Ring.

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Narayani Prasad ¹, R. P. K. Ray ²

Affiliations
1 Department of Biochemistry, F.B.S. & H., RA.U, Pusa (Samastipur), Bihar, IN
2 epartment of Physics, F.B.S. & H., RA.U, Pusa (Samastipur), Bihar, IN

Abstract

The ultrasonic velocities and densities of binary mixtures ofo-cresol, m-cresol and p-cresol with inert cyclohexane, have been determined experimentally at 303.15 K, 308.15K and 313.15K over entire range of composition using variable path ultrasonic interferometer and double wall pyknometer. These experimental data have been utilized to compute isentropic compressibility, intermolecular free length, molar volume, available volume and free folume as well as their excess values. The excess values, of these parameters have been evaluated and a comparative study of variation in molecular interaction of these isomers with cyclohexane has been explained on the basis of their non-linear variation with concentration and temperature. The interaction in these systems have been explained in terms of the formation of weak hydrogen bond O...H-0 and absence of any strong specific interaction.

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