Linear Second‐Order Model to Estimate Kinetic and Thermodynamic Parameters for H ₂ O ₂ Decomposition

A linear dynamic model of second‐order reversible and incorporating non‐isothermal effects through the Arrhenius and van't Hoff equations was proposed for the decomposition reaction of hydrogen peroxide via homogeneous catalysis with potassium iodide. Kinetic parameters—activation energy ( E a ) and equilibrium constant ( k )—and thermodynamic parameters—enthalpy (Δ H 0 ), Gibbs free energy (Δ G 0 ), and entropy (Δ S 0 )—were estimated. The parameter covariance matrix indicated minimal correlation between the estimated parameters, confirming their reliability. The integrated kinetic–thermodynamic model enables more accurate predictions of reaction behavior over different temperatures, while the second‐order reaction was validated by the influence of the temperature in k through the van't Hoff equation.