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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 ,测定了NdCl3·6H2 O(s)、CCl3COOH(s)和Nd(TCA) 3·3H2 O(s)在1mol/LHCl中的溶解焓。再根据盖斯定律设计了一个热化学循环 ,计算得到了六水合氯化钕与三氯醋酸反应的反应焓ΔrHmθ(2 98.15K) =2 0 1.688kJ/mol,并求出了Nd(TCA) 3·3H2 O(s)的标准生成焓ΔfHmθ[Nd(TCA) 3·3H2 O ,s ,2 98.15K ] =-3 0 5 3 .3kJ/mol。同时测定了Nd(TCA) 3·3H2 O(s) ,C9H7NO(s) ,Nd(TCA) (C9H6 NO) 2 (s)和CCl3COOH(s)在 4mol/LHCl、二甲亚砜和无水乙醇混合溶剂中的溶解焓 ,再根据盖斯定律设计了一个热化学循环 ,计算得到了三氯醋酸钕与 8 羟基喹啉反应的反应焓ΔrHmθ(2 98.15K) =-3 .2 2 6kJ/mol,并求出了Nd(TCA) (C9H6 NO) 2 (s)的标准生成焓ΔfHmθ[Nd(TCA) (C9H6 NO) 2 ,s ,2 98.15K] =-13 5 5 .6kJ/mol。
The solubility of NdCl3 · 6H2O (s), CCl3COOH (s) and Nd (TCA) 3 · 3H2 O (s) were measured in the new reaction calorimeter with constant temperature environment, / LHCl enthalpy of dissolution. Then according to Gass’s law, a thermochemical cycle was designed and the enthalpy of reaction ΔrHmθ (2 98.15K) = 20.868 kJ / mol was calculated by the reaction between neodymium chloride hexahydrate and trichloroacetic acid. The Nd (TCA) The standard enthalpy of formation ΔfHmθ [Nd (TCA) 3 · 3H 2 O, s, 2 98.15 K] = -3 0 5 3 .3 kJ / mol for 3 · 3H 2 O (s) The effects of Nd (TCA) 3 · 3H 2 O (s), C9H7NO (s), Nd (TCA) (C9H6 NO) 2 (s) and CCl3COOH (s) in the presence of 4mol / LHCl, dimethyl sulfoxide and absolute ethanol The enthalpies of solution in the mixed solvent were calculated and a thermochemical cycle was designed according to Gass’s law. The enthalpy of reaction ΔrHmθ (2 98.15K) = -3.226 kJ / mol for the reaction of neodymium trichloroacetate with 8-hydroxyquinoline was calculated. , And the standard enthalpy of formation ΔfHmθ [Nd (TCA) (C9H6NO) 2, s, 2 98.15K] = -13 5 5 .6kJ / mol of Nd (TCA) (C9H6 NO) 2