硝酸镧与丙氨酸反应的热化学研究

The standard molar reaction enthalpy of the solid-solid coordination reaction, La(NO3)3· 6H2O (s) + 4Ala(s) (Ala is Alanine) =La(NO3)3. (Ala)4·H2O(s) + 5H2O(1), has been studied by the classical solution calorimetry. The molar dissolution enthalpies of the reactants and the products in 2 mol/L HCl of this solid-solid coordination reaction have been measured by using an isoperibol calorimeter. From the results and other auxiliary quantities, the standard molar formation enthalpies of [La (NO3 )3. (Ala)4. H2O, s, 298.15 K] have been determined to be Hm [La (NO3)3. (Ala)4. H2O, s, 298. 15 K]= -3 864. 247 kJ/mol.