Abstract :
The activation energy for the thermal decompostion of chemical compounds can be determined using isothermal or non-isothermal TGA measurements or by using the recently introduced modulated TGA method (MTGA, TA Instruments). In the course of our investigation on the decompostion of complexes, we started a comparative study of different measurement and calculation procedures for the thermal decompositon of Mn(Urea)2Cl2. As a reference, we did the same study on the sublimation of N-n-propyloxamide. The results of our comparative study on the determination of the activation energy for the decomposition/sublimation of these compounds are given.