According to the thermokinetic equations of simple order reactions, a novel thermokinetic research method for simple order reactions--- the double-thermoanalytical-curve method is proposed in this paper. The method only needs characteristic data (α~m^*, Δ~m and t~m) of two thermoanalytical curves measured at different initial concentrations of reactants to calculate the rate constants of the studied reaction systems. Its mathematical model is k~n=(c~0~1^1^-^n- c~0~2^1^-^n)/(Φ~m~l-Φ~m~2). In order to test the validity of this method, the saponification of ethyl butyrate and ethyl benzoate in aqueous ethanol solvent, the hydrolysis of epichlorohydrin catalyzed by HBr in aqueous solution and the polymerization of acrylamide have been studied. The experimental results indicate that the double- thermoanalytical-curve method for simple order reactions is correct.

Key words: THERMODYNAMICS, REACTION RATE CONSTANT