The first and second ionization potentials of helium atoms are 24.58 eV and 54.4 eV respectively. Calculate the energy in kJ required to produce 1 mole of `He^(2+)` ions.

Explanation

` therefore ` For 1 atom , `E = 78.98 xx 1.6 xx 10^(-19)` J/atom or , `E = 78.98 xx 1.6 xx 10^(-22) ` kJ/atom
For 1 mole i.e. `N_A` atoms
`E_("Total") = 78.98 xx 1.6 xx 10^(-22) xx 6.023 xx 10^23 kJ = (761.11 xx 10^1) kJ = 7611` kJ/mol