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Prof. Mahmoud Ahmed Mohamed Mousa :: Publications:

Title:
Thermodynamic functions of the transfer of aminobenzoic acids from water to water-acetone mixtures at 25 ° C
Authors: Mahmoud Mousa Minha Hamed
Year: 1988
Keywords: Science
Journal: Thermochimica Acta
Volume: 136
Issue: Not Available
Pages: 23-31
Publisher: Elsevier
Local/International: International
Paper Link: Not Available
Full paper Not Available
Supplementary materials Not Available
Abstract:

Free energies (ΔGXXXt) and entropies (ΔSXXXt) of transfer of o-, m-, and p-aminobenzoic acids from water to water-acetone mixtures have been determined from solubility measurements at five temperatures (20–40 ° C). It is found that the specific solute-solvent interactions through dispersion forces play a major role on the nature of ΔGXXXt-composition profiles in the region of water-rich composition. However, in higher acetone concentration the hydrogen bonding interactions between the solvent molecules and the aminobenzoic acids as well as between the solvent molecules themselves were also considered. All these interactions have been proposed to interpret the ΔSXXXt-composition profiles and are discussed.

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