不等浓度二级反应的热动力学研究——环氧氯丙烷开环反应

Thermokinetics Study of Unequal Concentration Second Order Reactions-Ring-Ppening Reaction of Epichlorohydrin

本文根据热动力学的基础理论,应用不等浓度二级反应的无量纲参数法的基本方程,测定了27.2和36.5℃下环氧氯丙烷在缓冲液中与碘化钾开环反应的热谱曲线,计算了所测反应的速度常数活化能、活化自由能及活化熵,本文还讨论了缓冲液的浓度和 pH 值对所测反应速度常数的影响。

With the basic theory of thermokinetics and the basic equation of the dimensionless parameter method for the second order reaction of uncqal concentrations,the thermo- graphic curves for ring-opening reaction of epichlorohydrin with potassium iodide in buffer solution were measured at 27.2 and 36.5C in this paper.The constant,the rate activation energy,the activation free-energy and the activation entropy of the rea- ction were calculated.The influences of the concentration and pH values of the buffer solution on the measured rate constant were also discussed in this paper.