燃烧热测定实验技术的改进

On Technical Improvement in Experimental Determination of Combustion Heat

燃烧热的测定是物理化学实验中一个十分经典的教学实验,针对燃烧热测定实验中存在的燃烧成功率较低、实验误差较大的问题,从压片技术、点火丝安装方法和直线加曲线拟合的雷诺温度校正法等三方面进行了改进.改进后,其燃烧成功率可达100%,萘的测定相对误差减小为0.06%,可更好地用于燃烧热测定的实验教学.

Determination of combustion heat is a very classical experiment in teaching physical chemistry experiments.To solve the problems of the lower success rate and greater measurement errors,three improved experimental technologies,namely,tablet compressing,fixing ignition wire,and straight line and curve fitting in drawing Reynolds Curve,have been brought up.After improving,the success rate has improved to 100%;and the relative error of naphthalene＇s combustion heat is about 0.06%.It could be better applied in experiment teaching of determination of combustion heat.