Authors:
H. Langfelderovà Department of Inorganic Chemistry Slovak Technical University 880 37 Bratislava Czechoslovakia

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M. Linkešová Department of Inorganic Chemistry Slovak Technical University 880 37 Bratislava Czechoslovakia

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E. Jóna Department of Inorganic Chemistry Slovak Technical University 880 37 Bratislava Czechoslovakia

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The paper reports an attempt to correlate the structures of hydrates of copper(II) sulphate with some characteristic features of the kinetics of their thermal decompositions. Non-isothermal thermogravimetric measurements were employed to obtain values of experimental activation energy and entropy for the dehydration of CuSO4 · 5 H2O, CuSO4 · 3 H2O and CuSO4 · H2O. The values ofE* andΔS* for the dehydration of CuSO4 · 3 H2O were found to be only little affected by the mode of preparation of this compound. On the other hand, the values ofE* andΔS* for the dehydration of CuSO4 · ·H2O are strongly dependent on whether this compound was prepared by thermal decomposition of CuSO4 · 5 H2O or CuSO4 · 3 H2O, or by crystallization from solution. As regards the crystalline hydrates of copper(II) sulphate, the greatest energetic hindrance for dehydration was observed for CuSO4 · 3 H2O. The experimental results are also discussed with respect to the present opinions concerning the possibilities of using thermal analyses to obtain information on the relationship between the structures and reactivities of solids.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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