Journal article
Dissolution enthalpies of uric acid and uric acid dihydrate
Thermochimica Acta, Vol.354(1-2), pp.7-13
2000
Abstract
The dissolution enthalpies of uric acid and its dihydrate in Tris-buffer solutions were measured calorimetrically for the first time. It was found that these quantities do not depend significantly on pH (7.2-8.9), temperature (t=25-37°C), ionic strength (I=0.010-0.045 mol dm-3) and uric acid concentration (c=3.4-8.5 mmol dm-3). After subtracting the protonation enthalpy of Tris, the present results H2U(s) → H+(aq) + HU-(aq), Δ(r)H = (56.3 ± 0.4) kJ mol-1 H2U • 2H2O(s) → H+(aq) + HU-(aq) + 2H2O(aq), Δ(r)H = (64.5 ± 0.2) kJ mol-1 are consistent with those obtained from the temperature dependence of the solubility equilibrium constants reported in our previous work.
Details
- Title
- Dissolution enthalpies of uric acid and uric acid dihydrate
- Authors/Creators
- Z. Wang (Author/Creator)J. Seidel (Author/Creator)G. Wolf (Author/Creator)E. Königsberger (Author/Creator)
- Publication Details
- Thermochimica Acta, Vol.354(1-2), pp.7-13
- Publisher
- Elsevier BV
- Identifiers
- 991005544276107891
- Copyright
- 2000 Elsevier Science B.V.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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