Thermoanalytische und Kalorimetrische Untersuchung von CoOOH und CoOOD |
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Authors: | D Petzold |
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Institution: | (1) Sektion Chemie, Bergakademie Freiberg, 92 Freiberg, DDR |
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Abstract: | Zusammenfassung CoOOH und CoOOD wurden definiert hydrothermal synthetisiert, chemischanalytisch und röntgenographisch charakterisiert sowie thermoanalytisch untersucht.Nach den Ergebnissen verläuft der thermische Abbau zu CO3O4, H2O(g) bzw. D2O(g) und O2 in einer für Hydroxide typischen Einstufenreaktion. Ihre Temperaturlage ist vom Partialdruck der Reaktionsgase abhängig.Die hochtemperaturkalorimetrische Untersuchung erbrachte Werte für die Standardbildungsenthalpien
B
H
298
(CoOOH: –456±3; CoOOD: –455±3 kJ mol–1) sowie die Standardreaktionsenthalpien ihrer Zersetzungsreaktionen.
Hydrothermally synthesized CoOOH and CoOOD were characterized by chemical, X-ray and thermal analysis. The thermal decomposition leads to CO3O4, H2O(g) or D2O(g) and O2 in a one-step reaction typical for hydroxides. The decomposition temperature depends on the partial pressure of the gaseous reaction products. High-temperature calorimetric studies allowed determination of the standard enthalpy of formation
B
H
298
(CoOOH: – 456±3; CoOOD: –455±3 kJ mol–1) and the standard enthalpy of the decomposition reactions.
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![acy](/content/p122t74m11260766/xxlarge1072.gif) ![zcy](/content/p122t74m11260766/xxlarge1079.gif) ![ocy](/content/p122t74m11260766/xxlarge1086.gif) ![vcy](/content/p122t74m11260766/xxlarge1074.gif) ![acy](/content/p122t74m11260766/xxlarge1072.gif) ![ncy](/content/p122t74m11260766/xxlarge1085.gif) ![icy](/content/p122t74m11260766/xxlarge1080.gif) ![iecy](/content/p122t74m11260766/xxlarge1077.gif) Co3O4, ![gcy](/content/p122t74m11260766/xxlarge1075.gif) ![acy](/content/p122t74m11260766/xxlarge1072.gif) ![zcy](/content/p122t74m11260766/xxlarge1079.gif) ![ocy](/content/p122t74m11260766/xxlarge1086.gif) ![bcy](/content/p122t74m11260766/xxlarge1073.gif) ![rcy](/content/p122t74m11260766/xxlarge1088.gif) ![acy](/content/p122t74m11260766/xxlarge1072.gif) ![zcy](/content/p122t74m11260766/xxlarge1079.gif) ![ncy](/content/p122t74m11260766/xxlarge1085.gif) ![ycy](/content/p122t74m11260766/xxlarge1099.gif) 2 ![icy](/content/p122t74m11260766/xxlarge1080.gif) ![lcy](/content/p122t74m11260766/xxlarge1083.gif) D2 O2. ![Tcy](/content/p122t74m11260766/xxlarge1058.gif) ![iecy](/content/p122t74m11260766/xxlarge1077.gif) ![mcy](/content/p122t74m11260766/xxlarge1084.gif) ![pcy](/content/p122t74m11260766/xxlarge1087.gif) ![iecy](/content/p122t74m11260766/xxlarge1077.gif) ![rcy](/content/p122t74m11260766/xxlarge1088.gif) ![acy](/content/p122t74m11260766/xxlarge1072.gif) ![tcy](/content/p122t74m11260766/xxlarge1090.gif) ![rcy](/content/p122t74m11260766/xxlarge1088.gif) ![rcy](/content/p122t74m11260766/xxlarge1088.gif) ![acy](/content/p122t74m11260766/xxlarge1072.gif) ![zcy](/content/p122t74m11260766/xxlarge1079.gif) ![lcy](/content/p122t74m11260766/xxlarge1083.gif) ![ocy](/content/p122t74m11260766/xxlarge1086.gif) ![zhcy](/content/p122t74m11260766/xxlarge1078.gif) ![iecy](/content/p122t74m11260766/xxlarge1077.gif) ![ncy](/content/p122t74m11260766/xxlarge1085.gif) ![icy](/content/p122t74m11260766/xxlarge1080.gif) 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![kcy](/content/p122t74m11260766/xxlarge1082.gif) ![tcy](/content/p122t74m11260766/xxlarge1090.gif) ![ocy](/content/p122t74m11260766/xxlarge1086.gif) ![rcy](/content/p122t74m11260766/xxlarge1088.gif) ![iecy](/content/p122t74m11260766/xxlarge1077.gif) ![acy](/content/p122t74m11260766/xxlarge1072.gif) ![kcy](/content/p122t74m11260766/xxlarge1082.gif) ![tscy](/content/p122t74m11260766/xxlarge1094.gif) ![icy](/content/p122t74m11260766/xxlarge1080.gif) . ![Vcy](/content/p122t74m11260766/xxlarge1042.gif) ![scy](/content/p122t74m11260766/xxlarge1089.gif) ![ocy](/content/p122t74m11260766/xxlarge1086.gif) ![kcy](/content/p122t74m11260766/xxlarge1082.gif) ![ocy](/content/p122t74m11260766/xxlarge1086.gif) ![tcy](/content/p122t74m11260766/xxlarge1090.gif) ![iecy](/content/p122t74m11260766/xxlarge1077.gif) ![mcy](/content/p122t74m11260766/xxlarge1084.gif) ![pcy](/content/p122t74m11260766/xxlarge1087.gif) ![iecy](/content/p122t74m11260766/xxlarge1077.gif) 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![ocy](/content/p122t74m11260766/xxlarge1086.gif) ![pcy](/content/p122t74m11260766/xxlarge1087.gif) ![rcy](/content/p122t74m11260766/xxlarge1088.gif) ![iecy](/content/p122t74m11260766/xxlarge1077.gif) ![dcy](/content/p122t74m11260766/xxlarge1076.gif) ![iecy](/content/p122t74m11260766/xxlarge1077.gif) ![lcy](/content/p122t74m11260766/xxlarge1083.gif) ![icy](/content/p122t74m11260766/xxlarge1080.gif) ![tcy](/content/p122t74m11260766/xxlarge1090.gif) ![scy](/content/p122t74m11260766/xxlarge1089.gif) ![tcy](/content/p122t74m11260766/xxlarge1090.gif) ![acy](/content/p122t74m11260766/xxlarge1072.gif) ![ncy](/content/p122t74m11260766/xxlarge1085.gif) ![dcy](/content/p122t74m11260766/xxlarge1076.gif) ![acy](/content/p122t74m11260766/xxlarge1072.gif) ![rcy](/content/p122t74m11260766/xxlarge1088.gif) ![ncy](/content/p122t74m11260766/xxlarge1085.gif) ![ycy](/content/p122t74m11260766/xxlarge1099.gif) ![ecy](/content/p122t74m11260766/xxlarge1101.gif) ![ncy](/content/p122t74m11260766/xxlarge1085.gif) ![tcy](/content/p122t74m11260766/xxlarge1090.gif) ![acy](/content/p122t74m11260766/xxlarge1072.gif) ![lcy](/content/p122t74m11260766/xxlarge1083.gif) ![softcy](/content/p122t74m11260766/xxlarge1100.gif) ![pcy](/content/p122t74m11260766/xxlarge1087.gif) ![icy](/content/p122t74m11260766/xxlarge1080.gif) ![ocy](/content/p122t74m11260766/xxlarge1086.gif) ![bcy](/content/p122t74m11260766/xxlarge1073.gif) ![rcy](/content/p122t74m11260766/xxlarge1088.gif) ![acy](/content/p122t74m11260766/xxlarge1072.gif) ![zcy](/content/p122t74m11260766/xxlarge1079.gif) ![vcy](/content/p122t74m11260766/xxlarge1074.gif) ![acy](/content/p122t74m11260766/xxlarge1072.gif) ![ncy](/content/p122t74m11260766/xxlarge1085.gif) ![icy](/content/p122t74m11260766/xxlarge1080.gif) . BH
298
(![Scy](/content/p122t74m11260766/xxlarge1057.gif) ![ocy](/content/p122t74m11260766/xxlarge1086.gif) ![Ocy](/content/p122t74m11260766/xxlarge1054.gif) ![Ocy](/content/p122t74m11260766/xxlarge1054.gif) : –456±3; CoOOD: – 455±3 kJ m l– 1.
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