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活化能的教学在现行高中化学课本“反应速度和化学平衡”一章中占有很重要的地位,是教材中的一个重点,也是难点。由于这一概念比较抽象,诸家说法又略有不同,并且它涉及的方面较多,所以学生学习掌握有一定困难,教学中存在一些问题。例如,活化能的定义各书上不大一致,如何认识比较合适?活化能的单位是什么?如何理解和应用?活化能与温度有没有关系?情况为何?活化能与反应速度、反应热及键能的关系等等。我带着这些问题进行了学习和教学。下面谈谈自己的一些粗浅体会和看法,和同志们讨论。
The teaching of activation energy occupies an important position in the current chapter of “high-speed chemistry and chemical balance” in high school chemistry textbooks. It is a key and difficult point in textbooks. Because this concept is relatively abstract, the opinions of the families are slightly different, and it involves many aspects. Therefore, students have certain difficulties in learning and there are some problems in teaching. For example, the definition of activation energy is not consistent in each book, how to understand more appropriate? What is the unit of activation energy? How to understand and apply? Activation energy has nothing to do with temperature? What is the situation? Activation energy and reaction speed, reaction heat and Key energy relations and so on. I studied and taught with these questions. Let’s talk about some of my own superficial experiences and views and discuss them with comrades.