论文部分内容阅读
反应热是化学反应中吸收或放出的热量,等压条件下与焓变相等。这部分内容是实施新课改以来新增加的内容,近几年在高考中考查的频率很高,是高考的热点。有关反应热大小比较的题目很多,有一类题目是由于反应物和生成物的状态不同而比较焓变的大小,解法虽有多种,但笔者认为利用图像构建化学模型,巧解这类题目,能帮助学生直观、快速、有效地判断△H的相对大小。
The heat of reaction is the heat absorbed or released by the chemical reaction and is equal to the enthalpy under isobaric conditions. This part of the content is the implementation of the new curriculum since the new content added in recent years in the college entrance examination in the high frequency of examination is a hot college entrance examination. There are many topics on the comparison of heat of reaction, there are a number of topics that are due to the different states of reactants and products compared to the size of enthalpy change, although a variety of solutions, but I think the use of images to build chemical models, cleverly solve these problems, Can help students intuitively, quickly and effectively determine the relative size of △ H.