Ce(TCA)3·3H2O(s)的标准生成热

• 作 者: 首梦娟 李强国
• 机 构: 郴州师范高等专科学校化学系,郴州师范高等专科学校化学系 湖南郴州423000,湖南郴州423000
• 出 处: 武汉科技学院学报
• 发表日期: 2003年01期
• 关键词: 七水氯化铈 三氯醋酸 标准生成热

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 further study cerium trichloroacetate complex, it is necessary to know its basic thermodynamic properties. The solubility of CeCl3 · 7H2O (s), CCl3COOH (s) and Ce (TCA) 3 · 3H2O (s) in 1mol / L HCl were determined by the solvothermal method in a novel reaction calorimeter with a constant temperature environment. In the enthalpy of dissolution. According to Gass’s law, a thermochemical cycle was designed to obtain the reaction enthalpy DrHmq (298.15K) = 204.279kJ / mol for the reaction of cerium chloride heptahydrate with trichloroacetic acid and the molar ratio of Ce (TCA) 3 · 3H2O (s) Standard enthalpy of formation DfHmq [Ce (TCA) 3 · 3H2O, s, 298.15K] = -3060.0 kJ / mol.