The reactions between solid sodium carbonate and oxides of transition metals were investigated. The reactions were carried out under non-isothermal conditions and the degree of reaction was followed thermogravimetrically. Subsequent recording of TG curves showed that the reactions of Na2CO3 with oxides of iron, tungsten and vanadium proceed in one stage. Cr2O3 was found to react with sodium carbonate directly at lower temperatures, whereas at higher temperatures the dissociation of sodium carbonate also occurred. The reactions between sodium carbonate and oxides of titanium, manganese and molybdenum are complex and involve several stages. For all stages the activation energy and pre-exponentional factor were determined and, by analyzing the values obtained, a kinetic compensation effect for three homologous reaction series was observed.