量热法测定氯化镱与甘氨酸配合物的标准生成焓

The determination of the calorimetry of the standard molar formation enthalpy of ytterbium chloride with glycine complex

应用具恒温环境的反应热量计 ,分别测定了 [Yb Cl3· 6H2 O(s) +3 Gly(s) (Gly代表甘氨酸 ) ]和配合物 Yb(Gly) 3Cl3· 3 H2 O(s)在 2 mol· L- 1 HCl溶液中的溶解焓 .通过盖斯定律所设计的一个热化学循环 ,可计算得到六水氯化镱与甘氨酸配位反应的反应焓Δr Hmθ(2 98.1 5 K) =1 .0 73 k J· mol- 1 ,并估算出配合物 Yb(Gly) 3Cl3· 3 H2 O的标准生成焓Δf Hmθ(2 98.1 5 K) =-3 5 99.1 3 k J· mol- 1 .

The reaction enthalpy of coordination reaction of ytterbium chloride with glycine is determined by solution calorimetry in an isoperibol reaction calorimeter. The calormetric solvent is the solution of hydrochloric acid (2 mol·L -1 ), and a new thermochemical cycle is designed. According to the results, the values of Δ rH m θ (298.15 K) =1.073 kJ·mol -1 and Δ fH m θ(Yb(Gly) 3Cl 3·3H 2O,s,298.15 K)= -3 599.13 kJ·mol -1 are obtained.