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Title: Molecular interactions in binary liquid mixtures - An ultrasonic study
Authors: Naidu, P Subramanyam
Prasad, K Ravindra
Issue Date: Apr-2002
Publisher: NISCAIR-CSIR, India
Abstract: Ultrasonic velocities, densities and viscosities have been measured in the binary mixtures: (1) Dimethyl sulphoxide + 1 piperidine ethanol and (2) Dimethyl sulphoxide + 4 hydroxy 1 methyl piperidine in the temperature range 30- 50°C. Free Length Theory (FLT) due to Jacobson and Collision Factor Theory (CFT) due to Schaaffs have been applied successfully in evaluating velocities theoretically. CFT has been found to have an edge over FLT. From the thermodynamic parameters computed, excess parameters like βE, ΠE, H E, LFE, VE, etc. have been explained in the light of molecular interactions. Interactions of the type dipole-dipole, dipole-induced dipole strong interactions have been reported. At some concentrations, particularly in the mixture of DMSO with 1 piperidine ethanol, dispersive forces and weak bonding dominate the scene. Most of the excess parameters have indicated strong hetero-molecular interactions in both the mixtures.
Page(s): 264-271
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.40(04) [April 2002]

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