Raj, A.M.E. and Resima, L.B. and Jothy, V.B. and Jayachandran, M. and Sanjeeviraja, C. (2009) Ultrasonic study on binary mixture containing dimethylformamide and methanol over the entire miscibility range (0<x<1) at temperatures 303–323K. Fluid Phase Equilibria, 281 (1). pp. 78-86. ISSN 0378-3812

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Abstract

The experimental density and speed of ultrasound measurements in connection with literature data have been measured for pure N,N-dimethylformamide (DMF), methanol and their binary mixtures over the whole miscibility range at different temperatures 303, 308, 313, 318 and 323 K. These parameters were used to determine the adiabatic compressibility, intermolecular free length, molar compressibility, molar sound velocity, acoustic impedance, relaxation strength and their excess values. The variation of these parameters with composition of mixture indicates the nature and extent of interaction between unlike molecules. The non-ideal behavior of the systemstudiedwas explained on the basis of the dipole-induced dipole interactions and hydrogen bonding. The complex formation through intermolecular hydrogen bonding was confirmed from the recorded FTIR spectra. Available thermal energy breaks the bonds between the associated molecules into their respective monomers on increasing the temperature.

Item Type:	Article
Uncontrolled Keywords:	Ultrasonics; Velocity measurements; Compressibility; Relaxation; Hydrogen bonding
Subjects:	Electrochemical Materials Science
Divisions:	UNSPECIFIED
Depositing User:	TTBD CECRI
Date Deposited:	02 Apr 2012 06:34
Last Modified:	02 Apr 2012 06:34
URI:	http://cecri.csircentral.net/id/eprint/354

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