Carbon Ionization Energy

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

C -> C¹⁺ = 1086.2 kJ/mol = 259.86 Kcal/mol
C¹⁺ -> C²⁺ = 2352 kJ/mol = 562.68 Kcal/mol
C²⁺ -> C³⁺ = 4620 kJ/mol = 1105.26 Kcal/mol
C³⁺ -> C⁴⁺ = 6222 kJ/mol = 1488.52 Kcal/mol
C⁴⁺ -> C⁵⁺ = 37827 kJ/mol = 9049.52 Kcal/mol
C⁵⁺ -> C⁶⁺ = 47270 kJ/mol = 11308.61 Kcal/mol