  The dissolution enthalpies of BaCe0.7Ho0.2In0.1O2.85 and
BaCe0.7Sm0.2In0.1O2.85 were measured by method of solution calorimetry in 1M
hydrochloric acid with adding 0.1 M KI. The obtained data were compared with
earlier measured data on dissolution enthalpies of BaCe0.7Nd0.2In0.1O2.85,
BaCe0.7Gd0.2In0.1O2.85. The dependence of dissolution enthalpies from
lanthanide radius was constructed. As was shown the relationship is not linear.
