Ce(TCA)_3·3H_2O(s)的标准生成热  

The Standard Molar Formation Enthalpy of Ce(TCA)_3·3H_2O(s)

作　　者：首梦娟[1] 李强国[1] 

机构地区：[1]郴州师范高等专科学校化学系,湖南郴州423000

出　　处：《武汉科技学院学报》2003年第1期43-46,共4页Journal of Wuhan Institute of Science and Technology

摘　　要：为深入研究三氯醋酸铈配合物,很有必要认识其基本热力学性质。用溶解量热法,在自行研制的具有恒定温度环境的新型反应量热计中,测定CeCl3·7H2O(s) 、CCl3COOH(s)和 Ce(TCA)3·3H2O(s)在1mol/L HCl中的溶解焓。根据盖斯定律设计一个热化学循环,得到七水合氯化铈与三氯醋酸反应的反应焓DrHmq (298.15K)= 204.279kJ/mol,并求出了Ce(TCA)3·3H2O(s)的标准生成焓DfHmq [Ce(TCA)3·3H2O,s,298.15K]=-3060.0 kJ/mol。In order to make a deep research on cerium trichloroacetic acid, it is necessary to know its basic thermodynamics property. The standard molar reaction enthalpy of the reaction , CeCl3·7H2O(s) +3CCl3COOH(s)( TCA) = Ce(TCA)3?H2O(s) +3HCl(g) +4H2O(l) has been studied by the classical solution calorimetry . The molar dissolution enthalpies of the reactants and the products of the reactions in certain solvent in 1 mol/L HCl have been measured by using an isoperibol calorimeter. From the results and other auxiliary quantities , the standard molar formation enthalpy of [Ce(TCA)3·3H2O,s,298.15K] has been determined to be DfHmq[Ce (TCA)3·3H2O,s,298.15K]= -3060.0 kJ/mol .

关 键 词：Ce(TCA)3·3H2O(s) 七水氯化铈 三氯醋酸 标准生成热 热力学性质 溶解量热法 标准生成焓 

分 类 号：O614.332[理学—无机化学] O642.3[理学—化学]