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Enthalpy and entropy changes associated with the ionization of hydroxyethylenediaminetriacetic acid

✍ Scribed by J. Fuger; E. Merciny

Publisher
Wiley (John Wiley & Sons)
Year
2010
Weight
345 KB
Volume
77
Category
Article
ISSN
0037-9646

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✦ Synopsis

Enthalpy ck anges associated with the three ionizations of hydroxyethylenediarninetriacetic acid have been measured calorimetrically. The values reported for 25Β°C and p = 0.1 (KCI) are AH1 = -1.12&0.12, AH2 = +3.09&0.05 and AH3 = +6.65 h0.08 kcal.mole-l, respectively. From these data and from the acid dissociation constants, entropy changes are calculated. The results are compared with literature data obtained by the determination as a function of temperature of the acid dissociation constants.

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