Which of the following process is not involved in the calculaion of SRP value of alkalimetals?

MS→+S.EMg→-e-+I.EMg+→+H2O-H.EMH2On+SRP value of alkali metals depends upon the1) Sublimation energy [S.E]2) Ionization  energy [I.E]3) Hydration energy [H.E]But not depends on electron gain enthalpy [EA] because the alkali metals have the tendency to lose the electrons but they do not have the tendency to gain the electrons