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

The excess correlation factor delta g has been evaluated for a set of binary mixtures of polar liquids (aniline, pyridine, N,N-dimethylanili ne, methanol, 1-propanol, and 1-butanol) in the nonpolar solvent tetra chloromethane. Also excess Gibbs energy of mixing between induced nonp olar molecules (Delta G(AA)), between polar molecules (Delta G(BB)), a nd between polar-induced nonpolar molecules (Delta G(AB)) has been eva luated in these binary mixtures. delta g changes its sign in case of a lcohols, aniline, and pyridine whereas it remains negative in case of N,N-dimethylaniline. The results obtained through evaluation of Delta G(AB) have been used to corroborate the findings on delta g. The chang e of the sign of delta g is an indicator of the characteristic order-d isorder phase transition in extremely dilute polar-nonpolar solutions.