The thermal dehydration of Copper Acetate(WSDTY) hydrate has been studied, over a range of humidities. The dehydration is controlled by nucleation-and-growth kinetics at low temperatures, with an activation energy of 154 kJ·mol?1, which changes to contracting-disc kinetics at higher temperatures with a lower activation energy of 76 kJ·mol?1. Frequency factors have also been derived; the value for the high temperature process is low (107s?1) and that for the low temperature step is high (1017s?1). Optical microscopy has been used to clarify the bulk kinetics; there is evidence for a reactive layer at the surface of the decomposing solid.
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