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- W1640622589 abstract "Thermodynamic parameters (ΔH0, ΔG0, ΔS0) and the activation energy (ΔEs) were calculated to explain the limiting equivalent conductance (Λ0) and ion association constant (KA) of s-acetylthiocholine halides and perchlorate in methanol solutions at different temperatures by using conductance measurements. It has been evaluated by using Fuoss-Onsager equation. It is evident that the values of (Λ0) increase regularly with increase in temperature. For all salts of s-acetylthiocholine, (Λ0) indicates that higher mobility of the ions in all solvent systems studied. The free energy change ΔG0 values are negative for all salts (Br-, I- and ClO4-) in solvent systems studied. Clearly strengthening the interionic association at higher temperatures is largely caused by a decrease in the permitivity of the solvent. The positive values of (ΔH0) for three salts (Br-, I- and ClO4-) show that the association processes are endothermic in nature. Entropy change (ΔS0) values were positive for all salts because of decrease in solvation of ion-pair compared to that of the free ion. This may be attributed to increase in the degree of freedom upon association, mainly due to the release of solvent molecules." @default.
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- W1640622589 date "2014-03-01" @default.
- W1640622589 modified "2023-09-27" @default.
- W1640622589 title "Thermodynamic Studies of Ion Association of s-Acetylthiocholine Halides and Perchlorate in Methanol Solutions" @default.
- W1640622589 doi "https://doi.org/10.29356/jmcs.v58i1.150" @default.
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