蔗糖水解反应实验的动力学设计  

Kinetic Experiment Design for Sucrose Hydrolysis Reaction

作　　者：齐鹏 王艳娜 蒋建国[1,2] QI Peng;WANG Yan-na;JIANG Jian-guo(School of Biology and Chemical Engineering,Yangzhou Vocational University,Jiangsu Yangzhou 225009;School of Chemistry and Chemical Engineering,Nanjing University,Jiangsu Nanjing 210023,China)

机构地区：[1]扬州市职业大学生物与化工工程学院,江苏扬州225009 [2]南京大学化学化工学院,江苏南京210023

出　　处：《广州化工》2020年第23期21-23,共3页GuangZhou Chemical Industry

摘　　要：基于蔗糖水解实验,设计并研究了不同温度对蔗糖水解反应速率的影响。通过测定一定浓度的蔗糖水解体系在不同温度下的旋光度的变化,进一步揭示蔗糖的水解反应一级动力学本质,并求出蔗糖水解反应的热力学数据。结果显示,随着水解温度的增加,蔗糖水解反应速率明显加快;水解温度越高,体系旋光度降低到最小值所需的时间越短,并且蔗糖水解速率常数逐渐增大;由不同温度下的水解速率常数数据结合阿仑尼乌斯公式,求得蔗糖水解反应的活化能为73.02 kJ/mol。Kinetic experiment of sucrose hydrolysis reaction was designed and the effect of different temperatures on the sucrose hydrolysis reaction rate was studied.By measuring the change of the optical rotation of the sucrose hydrolysis system at different hydrolysis temperatures,the nature of the first order kinetics of the sucrose hydrolysis reaction was further revealed,and the thermodynamic data of the sucrose hydrolysis reaction was obtained.Results showed that with the increase of the hydrolysis temperature,the sucrose hydrolysis reaction rate was significantly accelerated.The higher the hydrolysis temperature,the shorter the time required for the optical rotation of the system to decrease to the minimum value,and the sucrose hydrolysis rate constant gradually increased.The activation energy of the sucrose hydrolysis reaction was 73.02 kJ/mol,which was calculated from the hydrolysis rate constant data at different temperatures with the Arrhenius formula.

关 键 词：反应动力学 一级反应 活化能 速率常数 

分 类 号：O643.12[理学—物理化学]