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化学是一门严谨但又琐碎的学科,很多学生在化学考试中之所以失分,并不是因为知识储备不够,而是在考试中由于忽视细节而引发各种失误所致,甚至于有些失误会频繁出现,成为顽疾。因此规范细节,完善解题步骤显得尤为重要。本文探究在热化学方程式的书写及应用中,把一些细节规范为解题步骤,以减少各种无谓失分。一、热化学方程式的书写例1已知在25℃,101 k Pa下,1 g甲醇完全燃烧生成CO2和液态水放热22.68 k J。书写甲醇
Chemistry is a rigorous but trivial subject. Many students lose points in chemistry examinations not because of lack of knowledge, but because of negligence of details in exams, and even mistakes Frequent, become ill. Therefore regulate the details, improve the problem-solving steps is particularly important. This article explores the formulation and application of thermochemical equations, some of the details of the specification as a solution to the problem, in order to reduce a variety of unnecessary loss of points. First, the thermochemical equation writing example 1 is known at 25 ℃, 101 k Pa, 1 g of methanol to complete combustion of CO2 and liquid water release heat 22.68 k J. Writing methanol