一种精密恒温环境微量燃烧-溶解-反应多用量热计的设计及应用  

Design and Application of a Precise Isoperibol Combustion-Solution-Reaction Microcalorimeter

作　　者：李旭[1] 李强国[1] 蒋建宏[1] 谷惠文[2] 李传华[1] 肖圣雄[1] 李霞[1] 

机构地区：[1]湘南学院化学生物与环境工程学院,湖南郴州423034 [2]长江大学化学与环境工程学院,湖北荆州434023

出　　处：《物理化学学报》2017年第6期1114-1122,共9页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(21273190);湖南省科技厅计划项目(2014TT2026)资助项目~~

摘　　要：将SRC-100型溶解-反应量热计改进成了一种精密恒温环境微量燃烧-溶解-反应多用量热计。采用电能法标定了量热计的能当量,其值为Ccalor=(987.63±0.61)J×K^(-1)。用该量热计分别测定了苯甲酸和丁二酸的标准质量燃烧热,分别为ΔcU~θ_(m,B)(cr,T=298.15 K)=-(26425.99±10.70)J?g^(-1)和Δ_cU~θ_(m,S)(cr,T=298.15 K)=-(12621.97±5.30)J?g^(-1)。测量的不确定度小于0.04%,精度高于0.05%。The SRC-100 type solution-reaction calorimeter was improved to a more precise and versatile isoperibol combustion-solution-reaction microcalorimeter. The energy equivalent of the calorimeter was calibrated to be Ccalor = （987.63 ± 0.61） J.K-1 by the electric calibration method. The standard massic energy of combustion of benzoic acid and succinic acid were determined by the developed isoperibol combustion-solution-reaction microcalorimeter as △CUm,Bθ（Cr, T = 298.15 K） = -（26425.99 ± 10.70） J·g-1 and AcUem,s（Cr, T = 298.15 K） = -（12621.97 ± 5.30） J·g-1, respectively. The uncertainty of the measurement was less than 0.04% and the accuracy was higher than 0.05%.

关 键 词：微量燃烧-溶解-反应量热计 标准质量燃烧热 苯甲酸 丁二酸 

分 类 号：TH81[机械工程—仪器科学与技术]