Hydrogen Ionization Energy

The Hydrogen Ionization Energy is the energy required to remove from atom one mole of electrons with subsequent production of positively charged ion of Hydrogen.
H -> H+ + e-
This process can be repeated many times, but the energy cost is increased dramatically. The general equation for the Hydrogen is:
HN+ -> H(N+1)+ + e-

Hydrogen Ionization Energy

H -> H1+ = 1312 kJ/mol = 313.88 Kcal/mol