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Thermochemistry study of the solid ternary complexes of the lanthanum with L-Tyrosine and Glycine

Jing Qu

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Abstract

The dissolution enthalpy of the reactans and the products was determined by solution calorimetry.The calorimetric solvent is 2mol·L -1 HCl solution.A thermochemistry cycle was designed to obtain the enthalpy of coordination reaction,Δ rH  m=-479.321kJ·mol -1 ,and the standardmolar enthalpy of formation of the new complex La(Tyr)(Gly) 3Cl 3·3H 2O(s) was calculated,Δ fH  m[La(Tyr)(Gly) 3Cl 3·3H 2O,s298.2K]=-4695.266kJ·mol -1 .

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What this paper is about

The dissolution enthalpy of the reactans and the products was determined by solution calorimetry.The calorimetric solvent is 2mol·L -1 HCl solution.A thermochemistry cycle was designed to obtain the enthalpy of coordination reaction,Δ rH  m=-479.321kJ·mol -1 ,and the standardmolar enthalpy of formation of the new complex La(Tyr)(Gly) 3Cl 3·3H 2O(s) was calculated,Δ fH  m[La(Tyr)(Gly) 3Cl 3·3H 2O,s298.2K]=-4695.266kJ·mol -1 .

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Available abstract

The dissolution enthalpy of the reactans and the products was determined by solution calorimetry.The calorimetric solvent is 2mol·L -1 HCl solution.A thermochemistry cycle was designed to obtain the enthalpy of coordination reaction,Δ rH  m=-479.321kJ·mol -1 ,and the standardmolar enthalpy of formation of the new complex La(Tyr)(Gly) 3Cl 3·3H 2O(s) was calculated,Δ fH  m[La(Tyr)(Gly) 3Cl 3·3H 2O,s298.2K]=-4695.266kJ·mol -1 .

Key concepts: Thermochemistry, Enthalpy, Calorimetry, Chemistry, Standard enthalpy of formation, Enthalpy change of solution, Thermochemical cycle, Enthalpy of atomization

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