Wee-Lam Ng, Chee-Cheong Ho, Sow-Kuan Ng
1978
Citations
0
Influential Citations
12
Citations
Journal
Journal of Inorganic and Nuclear Chemistry
Abstract
Abstract Isothermal dehydrations of the pentahydrate and trihydrate of copper sulfate are studied in the temperature ranges of 47–63°C and of 70.5–86°C respectively. Both dehydration processes involve the loss of two molecules of water in the temperature ranges studied. The topochemical kinetics of the reactions is well described by Avrami-Erofeev equation with x = 2 over the α-range of 0.1–0.9. Activation energies of 104 ± 10 kJ mol−1 and 134 ± 3 kJ mol−1 are evaluated and are approximately equal to the respective values of the heat of reaction. The methods of Jacobs and Kureishy and of Ng in obtaining activation energy from the decomposition curves are also discussed.