物理化学中“积分法测定反应级数”的教学探索

Teaching Exploration on Determining Reaction Order by Integration in Physical Chemistry

宏观动力学研究和化工设计都是从反应速率方程开始,确定速率方程的首要任务是测定反应级数。以生活和科研中实际问题的解决为驱动,以小组为单位,结合探究性实验“电导率法测定乙酸乙酯皂化反应的反应级数”的PBL教学设计和实施,激发和引导学生通过自主学习、自主探究、合作学习的方式共同解决问题,掌握了积分法,提高了学生宏观动力学实验设计能力和理论联系实际能力,培养了学生勇于创新、善于合作的科研精神。

The research on macroscopic kinetics and chemical engineering design starts from reaction rate equation, the determination of reaction order is the primary goal for identifying reaction rate equation.Combining with exploring experiment “reaction order of saponification of ethyl acetate by conductometry”,PBL instructive method was designed and implemented in teams using the solution of practical problems in daily life and research as driving force.The students were inspired and guided to deal with problem by autonomous learning, autonomous exploring and cooperative learning, thus understood well integration method. PBL instructive model promoted students’ abilities of experimental design and relating theory with practice on macroscopic kinetics, and cultivated their scientific spirit of innovation and cooperation.