Chemistry

Problem

Determine the first-ionisation energy of the singly-ionised helium atom (

\text{He}^+

) in

\text{kJ mol}^{-1}

. (Given: ionisation energy of ground-state hydrogen atom

= 13.6\,\text{eV}

per atom;

N_A = 6.022 \times 10^{23}\,\text{mol}^{-1}

;

1\,\text{eV} = 1.602 \times 10^{-19}\,\text{J}