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Abstract The rate of thermal decomposition of nickel sulfate was measured in the temperature range from 1003 K to 1078 K. When a powder sample was used, this reaction was characterized as a contracting volume reaction, with apparent activation energy of 296 kJ mol−1. The gaseous products were sulfur trioxide, sulfur dioxide, and oxygen. The composition of the gaseous products was near equilibrium in regard to the reaction, SO3=SO2+1/2 O2, because the nickel oxide formed had high catalytic activity for this reaction.
Onuki et al. (Tue,) studied this question.
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