ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Study of Dielectric Polarization in Extremely Dilute Solutions of Polar Liquids in Nonpolar Solvents through Evaluation of Excess Correlation Factor and Excess Gibbs Energy of Mixing

S. K. Ray, G. S. Roy, and S. Tripathy

Department of Physics, Ravenshaw College, Cuttack-753 003 Orissa, India

Abstract: The excess correlation factor δg has been evaluated for a set of binary mixtures of polar liquids (aniline, pyridine, N,N-dimethylaniline, methanol, 1-propanol, and 1-butanol) in the nonpolar solvent tetrachloromethane. Also excess Gibbs energy of mixing between induced nonpolar molecules (∆G_AA), between polar molecules (∆ G_BB), and between polar-induced nonpolar molecules (∆G_AB) has been evaluated in these binary mixtures. δg changes its sign in case of alcohols, aniline, and pyridine whereas it remains negative in case of N,N-dimethylaniline. The results obtained through evaluation of ∆G_AB have been used to corroborate the findings on δg. The change of the sign of δg is an indicator of the characteristic order-disorder phase transition in extremely dilute polar-nonpolar solutions.

Full paper in Portable Document Format: 502a50.pdf

Chemical Papers 50 (2) 50–54 (1996)