Thermodynamic analysis of metal oxides, metal peroxides and metal hydrides

The standard entropy differences between metal oxides (metal peroxides) and metal elements Delta S were roughly expressed by the following equation, |Delta S| proportional to Rln|Delta V|, R: gas constant, Delta V: volume differences below 10 cm3/ molO2, which is similar to the relation of metal hydrides. It was presumed that the entropy of oxygen in the metal oxides and the metal peroxides, together with the entropy of hydrogen in the metal hydrides can be controlled by the thermodynamics of ideal gas. Those volume differences were increased by increasing of the work function based on the small ion binding properties. However, the absolute values of the standard enthalpy differences |Delta H| had large values at Delta V of -22-8 cm3/molO2. The thermodynamic stabilities which are the absolute values of the standard enthalpy differences decreased in the order, metal oxides > metal peroxides > metal hydrides.

Automated summary

This passage discusses the standard entropy and enthalpy differences between metal oxides, metal peroxides, and metal hydrides, indicating their relationships and the assumption that the entropy of oxygen and hydrogen can be controlled by ideal gas thermodynamics.