Journal Articles (before-1995)

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Author: search.filters.author.Elsemongy, Mahmoud MStart date: 1980

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    Standard Potentials of the Silver/Silver Bromide Electrode and Related Thermodynamic Quantities in Propan-2-ol+Water Mixtures
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1981, 77 (05), 1981) Elsemongy, Mahmoud M; Fouda, Abdelaziz S
    Standard potentials of the Ag, AgBr electrode in eighteen propan-2-ol + water mixtures have been determined from e.m.f. measurements on the cell Pt|H2(g, 1 atm)|HBr (m), solvent|AgBr|Ag at nine temperatures from 15 to 55°C at 5°C intervals. These values were used to evaluate the standard thermodynamic functions for the cell reaction, the primary medium effects of various solvents upon HBr and the standard thermodynamic quantities for the transfer of one mole of HBr from water to propan-2-ol + water solvents. The results have been discussed in the light of ion–solvent interactions as well as the structural changes of these solvents.
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    Thermodynamics of Hydrochloric Acid in Dioxan + Water Mixtures from Electromotive Force Measurements
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1981, 77 (05), 1981) Elsemongy, Mahmoud M; Fouda, Abdelaziz; Amira, Mohamed F
    Electromotive force measurements using the cell Pt|H2(g,1 atm)|HCl(m), dioxan(X), H2O(Y)|AgCl(s)|Ag have been made at nine different temperatures from 15 to 55°C at five intervals in eighteen dioxan + water solvent mixtures. These have been used to evaluate the standard potentials of the Ag,AgCl electrode, the standard thermodynamic functions for the cell reaction, the primary medium effects of various solvents upon HCl and the standard thermodynamic quantities for the transfer of one mole of HCl from water to the respective dioxan + water media. The standard molal potential in each solvent has been represented as a function of temperature. The results have been discussed in relation to the acid–base properties and the breakdown of the structure of water on the addition of dioxan.