Abstract
The thermal decomposition of the hydroxysulphate and oxysulphate of iron(III) was carried out in air. Under dynamic conditions, the hydroxysulphate decomposes to the oxysulphate, which in turn decomposes to iron(III) oxide and sulphur oxides. The oxysulphate decomposes directly to iron(III) oxide and sulphur oxides. The heats of decomposition and heats of formation of the two basic sulphates were calculated.
Résumé
On a effectué, dans de l'air la décomposition thermique de l'hydroxysulphate et oxysulphate de fer. Entre conditions dynamiques, l'hydroxysulphate se décompose en oxysulphate qui, de sa part, se décompose en oxyde de fer(III) et oxydes de soufre. L'oxysulphate se décompose directement en oxyde de fer(III) et oxydes de soufre. On a calculé les chaleurs de décomposition et les chaleurs de formation des deux sulphates basiques.
Zusammenfassung
Die thermische Zersetzung von Eisenhydroxysulfat und -oxysulfat wurde in Luft durchgeführt. Unter dynamischen Bedingungen wird das Hydroxysulfat zu Oxysulfat zersetzt, welches seinerseits zu Eisen(III)oxiden und Schwefeloxiden zersetzt wird. Das Oxysulfat wird unmittelbar zu Eisen(III)oxid und Schwefeloxiden zersetzt. Die Zersetzungswärmen und die Bildungswärmen der zwei basischen Sulfate wurden berechnet.
Резюме
Проведено термическ ое разложение гидрок си- и оксисульфатов желез а в атмосфере воздуха. В динамическ их условиях гидрокси сульфат разлагается до оксис ульфата, который в свою очеред ь разлагается до окис и железа(Ш) и окислов серы. Оксисул ьфат разлагается прямо до окиси железа(Ш) и окисл ов серы. Вычислены теплоты ра зложения и теплоты образования двух основных сульфа тов.
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The authors express their grateful thanks to Dr. B. R. Sant for his valuable comments and suggestions, and to Prof. P. K. Jena, Director, for his kind permission to publish the results. One of us (MSRS) also thanks the Regional Research Laboratory (CSIR), Bhubaneswar, for a Senior Research Fellowship.
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Swamy, M.S.R., Prasad, T.P. Thermal analysis of iron(II) sulphate heptahydrate in air. V. Journal of Thermal Analysis 20, 107–114 (1981). https://doi.org/10.1007/BF01913002
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DOI: https://doi.org/10.1007/BF01913002