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Título : Thermodynamics of the thallium alkanoates VII. Heat capacity and thermophysics of thallium(I) butanoate at temperatures from 6 K to 480 K
Autor : Rodríguez Cheda, José A.; Fernández Martín, Fernando ; Burns, R. J.; Westrum, Edgar F.
Palabras clave : Chemical Thermodynamics
Thalium alkanoates
Thermophysics
Heat capacity
Fecha de publicación : ago-1994
Editor: Elsevier
Citación : The Journal of Chemical Thermodynamics 26(8): 829-838
http://hdl.handle.net/2027.42/31424
Resumen: The heat capacity of thallium(I) butanoate has been determined by adiabatic calorimetry from temperatures T of 5 K to 350 K and by differential-scanning calorimetry (d.s.c.) from 320 K to 480 K. A transition at T = (154.2 +/- 0.5) K, two very closely spaced crystalline-phase transitions at T = 285.36 K and 289.86 K as well as a crystal I-to-isotropic liquid transition at T = 456.7 K have been studied repeatedly by adiabatic calorimetry and/or d.s.c. The standard molar entropies of the several transitions are IV-to-III, 1.278[middle dot]R; III-to-II, 1.235[middle dot]R; II-to-I, 0.624[middle dot]R, and I-to-isotropic 1, 2.02[middle dot]R, respectively. Unlike higher members in this series, no mesomorphic phase occurs between crystalline phase I and the isotropic liquid phase.
URI : http://hdl.handle.net/10261/2556
DOI: 10.1006/jcht.1994.1099
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