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ULTRASONIC VELOCITY, VISCOSITY AND DENSITY STUDIES IN BINARY MIXTURES OF DIMETHYL FORMAMIDE AND ETHYLMETHYLEKETONE AT DIFFERENT TEMPERATURES

1999; Springer Nature; Volume: 37; Issue: 5 Linguagem: Inglês

0975-1041

V. K. Syal, Baljeet Singh Patial, Suvarcha Chauhan,

Thermal and Kinetic Analysis

Ult rason ic velocity, viscos ity and density ofct hylmethyl ketonc (EMK ) and N. -dimethyllurmamidc(DMF) havc heen reported at 25. 35 and 45°C. Ad iaba tic compress ihility W E) exccss adiaba ti c comprcssibi lity WE ). excess viscosity ( ll E). e. cess volume (I.f·) and relaxation time (1 ) have been calcul ated. Excess fu nct ions pE. 'lE and 1 E havc been cxamined as a fU ll ction of mole fracti oll of EMK (XEMK) and arc found to be negati ve over the \\'hok so lvent compos ition rangc of EMK +DMF mixtu res between 25 and 45°C. Variation of these cxcess functions and the re laxation time (1) as a fun cti on of so lvent com position and temperature ha ,,~ been discussed in terms of in termolecul ar interac ti oll.