Entropy differences between hydrides and other elements

Summary: The study focused on the work function of metals as an index of ion binding property between metals and hydrogen, and analyzed the relationship between the standard entropy change of metal hydrides and the work function of metals (alloys). It was found that the standard entropy changes of alloy-based metal hydrides linearly increased with the work functions of the alloys, which also increased with the bulk modulus. Additionally, the standard entropy change was proportional to the standard heat of formation due to certain constant relationships between parameters.