Reconstruction of thermodynamic equation of reaction process and its application in DSC/DTA
Chemical thermodynamics and thermal analysis(2022)
摘要
The traditional thermodynamic equation based on heat flow balance without reflecting the variation characteristics of the reaction process. New thermodynamics equation based on energy conservation is established involving multiple complex factors with reaction process, including species, matter mass and heat capacity. The DSC/DTA equation acquired from energy differential equation. The new equation reflects the dynamic Kirchhoff's law and expresses the heat capacity including the integral term and the differential term which both decided by reaction progression. Two kinds of modes with CaCO3 reactions are carried out to verify the equation. The theoretical calculations are well in accord with the experimental data, which validates the accuracy and reliability of the new equation.Reaction process; Thermodynamic equation; DSC/DTA; Thermal capacity
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关键词
thermodynamic equation,reaction process,dsc/dta
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