Abstract: Thermodynamics and Kinetics of MC₂O₄ (M=Mn, Fe, Co, Ni, Cu, Zn) were studied in N₂ or O₂ using DSC and TGA techniques. In N₂, the dehydration temprature Tde and enthalpy of dehydration ΔdeHm show “Two Group Domino Effect” along with atomic number Zre；ΔdeHm fluctuates in the range of (96.46±7.00) kJ•mol^-1；the decomposition temperature Td of MC₂O₄•2H₂O (M=Mn, Fe, Ni) and enthalpy have very good linearity along with atomic number Zre. When forming oxide MO in oxygen, decomposition enthalpy of MC₂O₄ (M=Co, Ni, Cu) shows a beeline along with atomic number Zre. All the reactions, except the dehydration of NiC₂O₄•2H₂O and the decomposition FeC₂O₄, belong to the same mechanism of random nucleation and growth, with integral form , and differential form .

Key words: DSC, TG, Oxalate, Transition elements, Atom number, Thermodynamics, Thermal analysis kinetics