Determination of thermodynamic properties of Bi2Mo3O12 (s), Bi2MoO6 (s) and Bi6Mo2O15 (s)

•ΔfGm° of monoclinic phase of Bi2MoO6 (s) has been determined.•Cp of Bi2Mo3O12 (s), Bi2MoO6 (s) and Bi6Mo2O15 (s) have been measured by DSC.•Internal consistency of the measured thermodynamic data of Bi2MoO6 (s) has verified. The standard molar Gibbs energy of formation of monoclinic phase of Bi2MoO6 (s) was determined by measuring the equilibrium oxygen partial pressures in the Bi (l) - MoO2 (s) -Bi2MoO6 (s) phase field using solid electrolyte based emf cells and it is given by the following expression: ΔfGm° ±0.9/kJmol-1=-1382.3+0.5064(T/K)(T:773-1023K) The molar heat capacities of Bi2Mo3O12 (s), Bi6Mo2O15 (s) and Bi2MoO6 (s) were experimentally measured employing a differential scanning calorimeter. The heat capacities measured over a temperature range is given by: CP (JK-1mol-1)±16.4=416.7-7.1×10-3T-8.8×106T-2(T:328-818K)CP (JK-1mol-1)±23.4=529.8+67.9×10-3T-6.3×106T-2(T:318-808K)CP (JK-1mol-1)±8.8=221.4-1.5×10-3T-3.9×106T-2(T:318-818K) The internal consistency of the measured thermodynamic data of Bi2MoO6 (s) has been verified.