一、问题提出任何化学反应都既有物质的变化又有能量的变化,能量变化贯穿于化学反应的始终,是学生理解化学现象的基础。同时化学反应与能量变化也是高考必考知识点之一。中和反应热的测定实验是高中化学教材中必修的学生实验,该实验内容也是化学反应与能量知识学习的重要部分。所以本文将通过手持技术,以“中和反应热的测定”为主线结合化学反应与能量变化的知识,探讨如何利用“四重表征”教学模式来促进学生对知识构建完整的认知。 First, the question put forward Any chemical reaction both material changes and energy changes, energy changes throughout the chemical reaction from the beginning, is the basis for students to understand chemical phenomena. At the same time, chemical reaction and energy change is one of the entrance exam knowledge point. Neutralization reaction heat measurement experiment is a required high school chemistry textbook student experiment, the content of the experiment is also an important part of chemical reaction and energy knowledge learning. Therefore, this article will use hand-held technology to “neutralization reaction heat measurement ” as the main line of chemical reaction and energy changes, to explore how to use know.