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Title: Dielectric relaxation studies of binary mixtures of acetone and N, N-dimethylacetamide in the benzene solutions using microwave absorption data
Authors: Rangra, Vir Singh
Sharma, D R
Keywords: Dielectric relaxation;Binary mixtures;Acetone;Dimethylacetamide
Issue Date: Aug-2003
Publisher: NISCAIR-CSIR, India
Abstract: Using standard standing wave microwave techniques and following Gopala Krishna's [Trans Faraday Soc, 33 (1957) 767] single frequency (9 .88 GHz) concentration variational method, the dielectric relaxation times (τ) and the dipole moments (μ) of the binary mixtures of different molar concentrations of acetone (Ac) in binary mixtures of acetone and N,N-dimethylacetamide in benzene solutions have been calculated at different temperatures (25, 30, 35 and 40 °C. The energy parameters (ΔHƐ , ΔFƐ, ΔSƐ) for the dielectric relaxation process of binary mixtures containing 50% mole fractions of Ac have been calculated, at the respective given temperatures. Comparison has been made with the corresponding energy parameters for viscous now. From the observations, it is found that the dielectric relaxation process like the viscous now process can be treated as the rate process. On the basis of above studies, solute-solvent type of the molecular association can be predicted.
Page(s): 630-633
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.41(08) [August 2003]

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