Solution enthalpies of barium cerate doped by gadolinium and indium and a mixture of BaCl2 + 0.7CeCl(3) + 2GdCl(3) + 0.1InCl(3) have been measured in 1 mol dm(-3) HCl with 0.1 mol dm(-3) KI. For the first time the standard molar formation enthalpy of BaCe0.7Gd0.2In0.1O2.85 has been determined by solution calorimetry as follows: Delta H-f degrees (298.15 K)= -1615.84 +/- 9.01 kJ mol(-1). The stabilization energy for above-mentioned compound has been calculated as well. It has been shown that barium cerate doped gadolinium and indium has higher stabilization energy than BaCe0.7Nd0.2In0.1O2.85 and BaCeO3. The reaction enthalpy with CO2 interaction has been calculated for BaCe0.7Gd0.2In0.1O2.85. (C) 2015 Elsevier B.V. All rights reserved.