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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 535 (1986), S. 123-134 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Bestimmung der Sublimation und Dissoziation von ThI4 und ThOI2 nach der Knudsen-MethodeDer Sublimationsdruck von ThI4 ergibt sich aus Messungen nach der Knudsen-Methode zu \documentclass{article}\pagestyle{empty}\begin{document}$$ \lg {\rm p/bar} = - 11200/{\rm T} - 4,57{\rm lg T} + 24,81 $$\end{document}. Mit der Sublimation von ThI4 erfolgt simultan eine geringe Dissoziation zu niederwertigem Iodid und Iod. Der Dissoziationsdruck des ThOI2 gemäß 2 ThOI2 = ThO2 + ThI4 ergibt sich, ebenfalls nach Effusionsmessungen, zu \documentclass{article}\pagestyle{empty}\begin{document}$$ \lg {\rm p/bar} = - 15490/{\rm T} - 4,57\lg {\rm T} + 25,85 $$\end{document} Die Molwärme von festem ThI4 wird kalorimetrisch zu 146 J K-1 mol-1 bestimmt, die Schmelzenthalpie zu rund 48 kJ mol-1. Die Normalentropie von festem ThOI2 ergibt sich zu 145 J K-1 mol-1.
    Notes: The sublimation pressure of ThI4 has been measured by the Knudsen effusion method and found to be \documentclass{article}\pagestyle{empty}\begin{document}$$ \lg {\rm p/bar} = - 11200/{\rm T} - 4.57{\rm lg T} + 24.81 $$\end{document}. Simultaneously with the sublimation of ThI4 there is a small dissociation to lower iodide and iodine. The dissociation pressure associated with the reaction 2 ThOI2 = ThO2 + ThI4 is \documentclass{article}\pagestyle{empty}\begin{document}$$ \lg {\rm p/bar} = - 15490/{\rm T} - 4.57\lg {\rm T} + 25.85 $$\end{document} The molar heat capacity of solid ThI4 has been determined calorimetrically to be 146 J K-1 mol-1, the heat of fusion is approximately 48 kJ mol-1. The standard entropy of solid ThOI2 is calculated to be 145 J K-1 mol-1.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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