In the classroom teaching of heat ofcombustion, we should first introduce combustion reaction and then lead to basic concept about it and about standard combustion reaction.
在燃烧热的课堂教学中,先介绍燃烧反应,再引出燃烧热、标准燃烧热的概念。
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The reason is that the main product ofcombustion, zinc sulphide, is not present in the list ofreaction species.