“燃烧热测定”实验中温度差的控制分析  

Analysis on the control of temperature difference in combustion enthalpy measurement experiment

作　　者：胡玮[1] 张干兵[1] HU Wei;ZHANG Gan-bing(College of Chemistry and Chemical Engineering,Hubei University,Wuhan 430062,China)

机构地区：[1]湖北大学化学化工学院,湖北武汉430062

出　　处：《实验室科学》2020年第1期30-32,共3页Laboratory Science

基　　金：国家自然科学基金(项目编号:21606075);湖北大学教学研究项目(项目编号:201408020-013914)。

摘　　要：分析了各版本教材对“燃烧热测定”实验中雷诺温度曲线校正方法描述的差异,指明在实验中如果内桶水温比外桶水温调低M℃时,T取(T 1+T 2)/2;而内桶水温比外桶水温调低1/2 M℃时,T取环境温度进行雷诺温度曲线校正,且按照后者进行实验操作和校正时所得燃烧焓的误差相对较小。建议采取对内桶水先量取体积,再调节温度的改进操作,可扩大待测试样的质量范围,更有利于学生实验。The descriptions differences of the Reynolds temperature curve correction in textbooks for the combustion heat measurement experiment were analyzed.It was pointed out if the water temperature of inner bucket was lower than that of the outer bucket by M℃in the experiment,T was(T1+T2)/2 for correction,while the water temperature of inner bucket was lowered by 1/2 M℃compared to water temperature of the outer drum,the ambient temperature was adjusted to the Reynolds temperature curve.Moreover,the error of the combustion enthalpy obtained during the experimental operation and calibration according to the latter method was relatively smaller.It is recommended to adopt an improved operation which is to measure the volume of inner barrel water and then adjust the temperature.The quality range of the sample to be tested in this improved procedure is expanded,which is more convenient for operation.

关 键 词：燃烧热的测定 雷诺温度曲线 温度差 氧弹式量热计 

分 类 号：G482[文化科学—教育学]