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用盖斯定律求解反应热属于高考的新增考点,也是近几年高考的热点,2008-2012年江苏高考卷、天津高考卷和广东高考卷等均频繁出现此类题型。然而,传统用化学方程式相互叠加的方法计算非常繁琐、凌乱、易错;而前段时间专家提出的所谓待定系数法与数学知识相结合,不仅增加了学生学习化学的难度,而且此方法很繁琐,学生不易学懂,更不易掌握。结合一线教学经验,简介一种快速、高效的解题方法。
The use of Gass’s law to solve the reaction heat belongs to the college entrance examination sites, but also the entrance exam in recent years, hot spots, Jiangsu college entrance examination in 2008-2012, Tianjin college entrance examination and Guangdong college entrance examination volumes are frequently such questions. However, the traditional methods of chemical equations overlap each other is very cumbersome, messy, error-prone; and the so-called undetermined coefficient method proposed by experts and mathematical knowledge combined to not only increase the difficulty of learning chemistry for students, but this method is cumbersome, Students are not easy to learn, but not easy to grasp. Combined with first-line teaching experience, a quick and efficient solution to the problem is introduced.