萘燃烧焓测定实验条件的正交优化  

Experimental Study on Naphthalene Enthalpy by Orthogonal Optimization

作　　者：胡猛 

机构地区：[1]上海应用技术大学化学与环境工程学院,上海201418

出　　处：《广州化工》2016年第21期154-157,共4页GuangZhou Chemical Industry

基　　金：上海市高校青年教师培养计划(ZZyy15088);上海应用技术学院引进人才科研启动基金(YJ2014-20)

摘　　要：燃烧焓测定是物理化学教学中基本实验之一。日常教学中发现,学生实验时对测定条件的选择依据不清楚,也不清楚这些条件对测定的影响大小。因此测定结果往往存在较大的偏差。为此,我们使用三因素四变量正交表L16(43),研究了萘质量、压片压力和氧弹充气压力等因素对燃烧焓的测定的影响。研究发现,因素中影响最大的是氧弹充氧压力,而萘质量、压片压力对测定的影响不大;最佳测定条件是萘质量0.6 g,压片压力1.0 MPa,充氧压力4.0 MPa。Enthalpy of combustion was determined by oxygen-bomb calorimeter adiabatically and their experimental factors including the mass of naphthalene, the pressure of preparing and oxygen pressure in oxygen-bomb were studied. It was found that the oxygen pressure in the bomb was the key for the measurement of naphthalene enthalpy, the optimized experimental conditions were O. 6 g of naphthalene, 1.0 MPa for pressing the sample and 4.0 MPa for the oxygen pressure.

关 键 词：物理化学教学 燃烧焓 正交实验 氧弹 压力 优化 

分 类 号：G642.0[文化科学—高等教育学]