High-temperature heat capacity of CdO–V2O5 oxides

Resumo

Vanadates Cd₂V₂O₇ and CdV₂O₆ have been prepared from CdO и V₂O₅ by three-phase synthesis with subsequent burning at 823–1073 K and 823–853 K, respectively. The molar heat capacity of these oxide compounds has been measured by differential scanning calorimetry. The enthalpy change, the entropy change, and the reduced Gibbs energy are calculated using the experimental dependences C_p = f(T). It is shown that there is a correlation between the specific heat capacity and the composition of CdO–V₂O₅ oxide system.