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引言讲授内容为第三章溶液——第三节溶解时吸热及放热现象。在前两节已讲过的溶液初步概念的基础上,通过物质溶解时的吸热放热现象的讲解,使同学们更进一步地了解溶液的正确而科学的定义。一、先深入体会教材,再确定教学目的:1.看完教科书以后,体会到在这节里,主要的中心内容是如何使同学们理解溶液的更科学的定义:“溶质的分子和溶剂的分子,以及它们相互反
Introduction lecture content for the third chapter solution - the third end of the dissolution of endothermic and exothermic phenomenon. Based on the preliminary concepts of the solutions already mentioned in the previous two sections, students are given a better understanding of the correct and scientific definition of solutions by explaining the endothermic exothermic phenomena during material dissolution. First, the depth of understanding of teaching materials, and then determine the purpose of teaching: 1. After reading the textbook, realize in this section, the main center is how to make students understand the more scientific definition of solution: "Solute molecules and solvents Molecules, and they are the opposite of each other