Kinetic studies of the solid-state decomposition of manganese(II) formate dihydrate. Part II. Isothermal and dynamic methods of studying powdered samples

Abstract

A simple means of handling data obtained isothermally and gravimetrically is shown to be valid for powdered materials, provided there is reproducibility in particle size between samples. Dynamic thermoanalytical methods, consisting of thermogravimetric analysis and differential enthalpic analysis, are also capable of being used under certain defined conditions. The same value (17·2 ± 1·0 kcal mol^–1) of the activation enthalpy for the dehydration of manganese(II) formate dihydrate (MFD) is obtained by seven different methods, using various combinations of powdered samples, single crystals, and isothermal and dynamic conditions of study.