Browsing by Author "Mazumdar, K."

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    Standard potentials of silver–silver chloride electrode at different temperatures and transfer energetics of hydrochloric acid in urea + water mixtures
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1973, 69 (4), 1973) Kundu, K. K.; Mazumdar, K.
    Standard potentials (E°) of the Ag–AgCl electrode in four different compositions of urea + water mixtures at seven different temperatures from 10 to 40°C have been determined from the e.m.f. measurements of cells of the type: Pt, H2(g, 1 atm)|HCl(m), urea + water mixtures|AgCl–Ag. These values have been utilized to evaluate the transfer energetics (ΔG°t, TΔS°t and ΔH°t) accompanying the transfer of 1 mol of HCl from the standard state in water to the standard state in urea + water mixtures. Attempts have been made to explain the transfer energetics in the light of ion-solvent interactions and the structural contributions of the solvents. A detailed analysis of entropy changes accompanying the transfer process indicates that at about 5–7 m of urea there is an enhancement of the structure of the urea + water mixtures possibly due to the formation of hydrogen-bonded urea-water complex.