Ehp. Cordfunke et As. Booij, THE STANDARD MOLAR ENTHALPIES OF FORMATION OF RARE-EARTH TRIHALIDES .2. CECL3(S) AND LACL3(S), Journal of Chemical Thermodynamics, 27(8), 1995, pp. 897-900
The standard molar enthalpies of solution of CeCl3(s) in HCl(aq) of co
ncentration 0.234 mol . dm(-3), and LaCl3(s) in HCl(aq) of concentrati
on 1.006 mol . dm(-3) have been measured. From these values the standa
rd molar enthalpies of formation have been derived: Delta(f)H(m)(o)(Ce
Cl3,s,298.15 K) = -(1060.5 +/- 0.5) kJ . mol(-1) and Delta(f)H(m)(o)(L
aCl3,s,298.15 K) = - (1072.2 +/- 1.4) kJ . mol(-1). These results are
compared with previous values from the literature. (C) 1995 Academic P
ress Limited.