International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Special Issue: 09 | Sep -2017
p-ISSN: 2395-0072
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One Day International Seminar on Materials Science & Technology (ISMST 2017) 4th August 2017 Organized by
Department of Physics, Mother Teresa Women’s University, Kodaikanal, Tamilnadu, India
ULTRASONIC STUDIES ON MOLECULAR INTERACTION IN TERNARY LIQUID MIXTURES OF N-N DIMETHYL FORMAMIDE, METHYL BENZOATE, AND CYCLOHEXANE At 303K, 313K, and 323K K. Sirajunishaa, Dr. M. M. Armstrong Arasub a
Department of Physics, St. Joseph’s College (Autonomous) Tiruchirappalli- 620002. TN Assistant Professor, Department of Physics, St. Joseph’s College (Autonomous) Tiruchirappalli- 620002. TN ---------------------------------------------------------------------***--------------------------------------------------------------------ABSTRACT: The ultrasonic velocity measurements kinds of association, the molecular packing, molecular are highly sensitive to molecular interaction and can motion, and various types of intermolecular be used to provide qualitative information about the interactions and their strengths. In the present study physical nature and strength of molecular interaction molecules of N-N-Dimethyl formamide (DMF) as a in the liquid mixture. Ultrasonic velocity of a liquid polar solvent and this is a colourless liquid. The was related to the binding forces between the atoms ultrasonic investigation of DMF is important because or the molecules. Ultrasonic velocity (U), Density (ρ), of its use in industry and medicine. Methyl and Viscosity (η) of N-N Dimethyl Formamide, Methyl benzoate is a colorless liquid that is poorly soluble Benzoate and Cyclohexane at different temperatures in water, but miscible with organic solvents. Methyl 303K, 313K & 323K were determined. The acoustic benzoate has a pleasant smell strongly parameters provided a better insight into molecular reminiscent of the fruit of the feijoa tree and it environments in liquid mixtures. The various is used in perfumery. The Cyclohexane is non acoustical parameters such as acoustic impedance polar, a solvent and used in the production of (Z), Adiabatic Compressibility (β), Relaxation Time nylon. Cyclohexane is mainly used for the industrial production of adipic acid and caprolactam (τ), Wada’s Constant (W), Free Volume (VF), which are precursors to nylon. Classical absorption, and Intermolecular free length (Lf), have been calculated for the present ternary EXPERIMENTAL system. The calculated values had their own physical significance and lead to better All the chemicals used in this present research understanding between the liquids. work are analytical reagent (AR) grades of minimum assay of 99.8%, 99.5%, 99% obtained from E-Merck, Key Words: Acoustic Impedance (Z), Adiabatic Germany and Sd Fine Chemicals, India, which are Compressibility (β), Relaxation Time (τ). used as such without further purification. The purities of the above chemicals were checked by density INTRODUCTION determination at 303, 313 and 323K ± 0.1K which showed an accuracy of ± 1×10–4g on a electronic Ultrasonic investigation of liquid mixtures digital balance (Model: SHIMADZU AX 200). The containing polar and Non Polar components is of density was measured using pycnometer of capacity 10 considerable importance in understanding ml and gave an estimated reproducibility of +0.0001g intermolecular interaction between the component cm-3. The viscosity was measured using an Ostwald’s molecules as that finds application in several Viscometer having time of effulix 0.01s and the industrial and technological processes. Knowledge of accuracy was found to be 3×10-6 Nm-2S. An thermodynamic and acoustical properties is of great electronically digital operated constant temperature significance in studying the Pysico – Chemical bath (Mittal Enterprises, New Delhi) has been used to behavior and molecular interactions in a variety of circulate water through double walled measuring cell liquid mixtures. Acoustic and thermodynamic made up of steel containing the experimental solution parameters have been used to understand different b
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