新型数字化实验系统在反应热测定中的应用研究  

Application Research of Novel Digital Experimental System in Reaction Heat Measurements

作　　者：廖治华 杜钦芝 杨国敏 张明晓[3] 陈时洪[3] LIAO Zhihua;DU Qinzhi;YANG Guomin;ZHANG Mingxiao;CHEN Shihong(Chongqing No.1 Middle School,Chongqing 400030,China;Chongqing No.8 Middle School,Chongqing 400030,China;School of Chemistry and Chemical Engineering,Southwest University,Chongqing 400715,China)

机构地区：[1]重庆市第一中学校,重庆400030 [2]重庆市第八中学校,重庆400030 [3]西南大学化学化工学院,重庆400715

出　　处：《西南师范大学学报（自然科学版）》2023年第6期120-128,共9页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：重庆市教育科学“十三五”规划课题“中学化学数字化实验系统的开发和应用”(2020-11-219)。

摘　　要：反应热及其测定是中学化学教学的重点和难点.选择典型的放热反应(NaOH+HCl,Mg+HCl,Zn+CuSO_(4))及吸热反应(NaHCO_(3)+HCl)体系为研究对象,利用本项目组自主研制的MXLab21先进数字化实验系统,以简易保温装置作为反应器,在无需对反应器吸热进行校正的情况下,实现了各类反应热的准确测量(相对误差小于4%).此数字化实验系统不但适用于热效应不同的放热和吸热反应体系,也适用于物态不同的固、液和气体参与的反应体系热效应的测定,且操作便捷,反应装置简单,测定时间短,能实时直观快速地呈现出溶液温度随时间变化的动态曲线,准确给出反应温度升高值(温升)或温度降低值(温降),适于中学化学的数字化课堂教学,对化学学科核心素养的培养具有重要价值.Reaction heat and its measurement are the key and difficult points in middle school chemistry teaching.The typical exothermic reaction(NaOH+HCl,Mg+HCl,Zn+CuSO_(4))and endothermic reaction(NaHCO_(3)+HCl)systems were selected as the research objects,and a simple thermal insulation device served as the reactor,and the MXLab21 advanced digital experimental system,which was independently developed by our project team,was used to achieve accurate measurement of various reaction heats(relative error less than 4%)without the correction of heat absorption by the reactor.This digital experimental system is suitable not only for exothermic and endothermic reaction systems with different thermal effects,but also for the reaction systems with different solid,liquid and gas states.It possesses the advantages of convenient operation,simple reaction device and short measurement time,and can display the dynamic curve of the solution temperature changing with time in real time,and accurately give the value of the increase or decrease of the reaction temperature.This digital experimental system is suitable for the digital classroom teaching of middle school chemistry courses,and is of great value to the cultivation of the core literacy of chemistry.

关 键 词：数字化实验 中和反应 置换反应 复分解反应 反应热测定 

分 类 号：G642.42[文化科学—高等教育学]