For example, the combination of decohesion process of standard M and charge transfer process is analogous to the process by which M in the standard state ionized to form (hydrated) ions, it is reasonable that Edecohesion + Eelectron transfer correlates with ∆𝐺 °f,M 𝑛, as the blue part in the Figure , which represents the standard production energy of hydrated ions. In the same manner, second and third terms in the eq. 4 can be attributed to the decomposition process as shown in Figure , red and green parts, indicating that the eq. 4 and their term are physically reasonable.