Iodine Ionization Energy

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

I -> I¹⁺ = 1008.4 kJ/mol = 241.24 Kcal/mol
I¹⁺ -> I²⁺ = 1845.9 kJ/mol = 441.60 Kcal/mol
I²⁺ -> I³⁺ = 3200 kJ/mol = 765.55 Kcal/mol
I³⁺ -> I⁴⁺ = 4100 kJ/mol = 980.86 Kcal/mol
I⁴⁺ -> I⁵⁺ = 5000 kJ/mol = 1196.17 Kcal/mol
I⁵⁺ -> I⁶⁺ = 7400 kJ/mol = 1770.33 Kcal/mol
I⁶⁺ -> I⁷⁺ = 8700 kJ/mol = 2081.34 Kcal/mol
I⁷⁺ -> I⁸⁺ = 16400 kJ/mol = 3923.44 Kcal/mol
I⁸⁺ -> I⁹⁺ = 19300 kJ/mol = 4617.22 Kcal/mol
I⁹⁺ -> I¹⁰⁺ = 22100 kJ/mol = 5287.08 Kcal/mol