硫脲氧化反应的热效应  

Heat Effect in Oxidation of Thiourea

作　　者：王舜[1] 高庆宇[1] 林娟娟[2] 尹文萱[1] 刘兵[1] 程勇[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221008 [2]温州师范学院化学与材料科学系,浙江温州325027

出　　处：《中国矿业大学学报》2004年第4期375-378,共4页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(20103010);教育部优秀青年教师资助计划项目

摘　　要：用氧弹量热计测定了硫脲、二硫甲脒盐酸盐、二氧化硫脲以及三氧化硫脲的燃烧热,并由此获得二硫甲脒盐酸盐、二氧化硫脲以及三氧化硫脲的标准摩尔生成焓,其值分别为8.19,-431.49和-833.32kJ/mol.同时采用燃烧热和生成热两套数据分别计算了过氧化氢氧化硫脲生成二硫甲脒盐酸盐、二氧化硫脲以及三氧化硫脲的反应焓,计算结果吻合性好,其标准摩尔反应焓分别为127.11～127.12,-543.66～-543.64和-1043.56～-1043.53kJ/mol.The enthalpies of combustion of thiourea, formamidine disulphide dihydrochloride, thiourea dioxide, and thiourea trioxide were measured using an oxygen bomb calorimeter, and from which the molar standard enthalpies of formation of formamidine disulphide dihydrochloride, thiourea dioxide, and thiourea trioxide were obtained with values of 8.19,-431.49 and -833.32 kJ/mol, respectively. Further, the molar standard reaction enthalpies, for the formation of formamidine disulphide dihydrochloride, thiourea dioxide and thiourea trioxide via the reactions between thiourea and hydrogen peroxide, were also calculated utilizing the data of combustion enthalpies or formation enthalpies.The two calculations are almost the same. Their values are (127.11)—127.12,-543.66—-543.64 and -1 043.56—-1 043.53 kJ/mol, respectively.

关 键 词：热效应 热化学 硫脲 过氧化氢 二硫甲脒盐酸盐 三氧化硫脲 

分 类 号：O642.31[理学—物理化学]