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一、教材分析本节是人教版化学必修2第二章《化学反应与能量》第三节的内容。在前面两节中,教材着重探讨化学能向其他能量的转化,并指出化学反应中的物质变化及伴随发生的能量变化是化学反应的两大基本特征。本节教材从另一个角度研究化学反应,是对前两节内容的延伸和完善。它探讨人们在面对具体的化学反应时要考虑的两个基本问题:外界条件对化学反应速率和化学反应限
First, textbook analysis This section is PEP 2 Chemistry Chapter 2 “Chemical Reactions and Energy,” the third quarter. In the previous two sections, the textbook focuses on the conversion of chemical energy to other energies and points out that the material changes in chemical reactions and the accompanying energy changes are two basic characteristics of chemical reactions. The textbook of this section examines chemical reactions from another perspective, which is an extension and improvement of the first two sections. It explores two basic questions people should consider when confronting a concrete chemical reaction: the external conditions affect the chemical reaction rate and the chemical reaction limit