基于问题驱动的活化能教学新方法

New Teaching Method of Activation Energy Based on Problem Driven

在叙述了活化能概念沿革的基础上,基于其教学中存在的问题和困难,提出运用教学软件建构活化能相关知识模型,并以Cl_(2)和H_(2)反应为例,在问题链驱动下,实现学生主动探究并认识基元反应、有效碰撞及活化能等概念。教学实践证明,该方法能有效打破学生已有的迷思概念,帮助其建立活化能相关的知识模型,进而从能量视角认识和解释影响化学反应速率的因素。

On the basis of describing the evolution of the concept of activation energy,and based on the problems and difficulties in its teaching,this paper puts forward the use of teaching software to construct the knowledge model related to activation energy,taking the reaction of hydrogen with chlorine as an example,driven by the problem chain,students can actively explore and understand the concepts of elementary reaction,activated molecule,activation energy and effective collision.It is proved that this method can effectively break students'existing misconception,help students establish concepts and models related to activation energy,and then understand and explain the factors affecting the rate of chemical reaction from the perspective of energy.