An assessment of the Thermodynamic Difference Rule for mixed inorganic oxides and comments on the enthalpies of formation of phosphates

作者：Holland Diane^*; Jenkins H Donald Brooke

来源：Thermochimica Acta, 2015, 601: 63-67.

DOI：10.1016/j.tca.2014.11.026

• Thermodynamic Difference Rule
• P2O5
• Enthalpy of formation

The applicability of the Thermodynamic Difference Rule to mixed inorganic oxides is assessed for a range of aluminates, borates, ferrites, phosphates, silicates and vanadates. The deviation of the phosphate data from the linear relation between the enthalpy of formation, Delta H-f degrees, of the solid solvating oxide and (H)(Hf), the Thermodynamic Difference Rule Constant, is discussed and we conclude that the use of Delta H-f degrees(P4O10, s) to provide the solvating oxide data is inappropriate and, instead, a value for Delta H-f degrees(P2O5, s) of -1618 +/- 9 kJ mol(-1) is proposed.

• 出版日期2015-2-10