Journal of Chemical Thermodynamics, Vol.27, No.8, 897-900, 1995
The Standard Molar Enthalpies of Formation of Rare-Earth Trihalides .2. Cecl3(S) and Lacl3(S)
The standard molar enthalpies of solution of CeCl3(s) in HCl(aq) of concentration 0.234 mol . dm(-3), and LaCl3(s) in HCl(aq) of concentration 1.006 mol . dm(-3) have been measured. From these values the standard molar enthalpies of formation have been derived : Delta(f)H(m)(o)(CeCl3,s,298.15 K) = -(1060.5 +/- 0.5) kJ . mol(-1) and Delta(f)H(m)(o)(LaCl3,s,298.15 K) = - (1072.2 +/- 1.4) kJ . mol(-1). These results are compared with previous values from the literature.