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Thermophysics of metal alkanoates. Heat capacities and thermodynamic properties of potassiumn-hexanoate from temperatures from 6 K to 600 K. VIII

✍ Scribed by Stanley P. Ngeyi; ; Imrana Malik; ; Bruce H. Justice; ; Edgar F. Westrum; Jr

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 94 KB
Volume: 33
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.2000.0743

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✦ Synopsis

The heat capacity morphology of potassium n-hexanoate from T = 6 K to T = 350 K was determined by equilibrium adiabatic calorimetry and by differential scanning calorimetry (d.s.c.) from T = 300 K to T = 635 K. The curve was characterized by peaks assumed to be associated with solid → solid first order transformations at about T = 252.5 K and T = 325 K. A much sharper transition, also considered to be first order was observed at T = 497 K. Fusion was observed at T = 548 K. Tabulated experimental molar heat capacities and adjuvant smoothed thermodynamic functions derived by integration therefrom are presented at selected temperatures.

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