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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 391 (1972), S. 107-112 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thermische Zersetzung von (NH4)2MoS,4 und (NH4)2WS4. Bildungsenthalpie von (NH4)2MoS4Die Reaktionen (NH4)2MeS4 = 2 NH3 + H2S + MeS3 (Me = Mo, W) wurden durch Messung der Zersetzungsdampfdrucke untersucht. Die thermochemischen Daten ergaben sich zu: δH = 52 kcal/Mol und ΔS = 105 cal/Grad. Mol für die Zersetzung von (NH4)2MoS4 sowie ΔH = 59 kcal/Mol und ΔS = 106 cal/Grad. Mol für die Zersetzung von (NH4)2WS4- Die Normalbildungsenthalpie von (NH4)2MoS4 wurde zu ΔHf,2980 = -140 kcal/Mol bestimmt. Die Kinetik der oben angegebenen Reaktionen wurde ebenfalls gemessen.
    Notes: The reactions (NH4)2MeS4 = 2 NH3 + H2S + MeS3 (Me = Mo, W) were investigated by measuring the decomposition vapour pressures. Thermochemical data were obtained from these measurements: ΔH = 52 kcal/mole and ΔS = 105 cal/deg.mole for the decomposition of the tetrathiomolybdate. Similarly, ΔH = 69 kcal/mole and ΔS = 106 cal/deg.mole were obtained for the decomposition of the tetrathiotungstate. The normal heat of formation of (NH4)2MoS4 was found to be ΔHf,2980 = -140 kcal/mole. The kinetics of thermal decomposition of the above reactions were also measured.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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