The first ionisation energy of $\mathrm{He}$ is 24.6 eV and that of hydrogen is 13.6 eV. Take 1 eV per atom = $96.485\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$. The total energy to remove both electrons from one mole of gaseous $\mathrm{He}$ atoms is closest to

1. A$7622\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$
2. B$5249\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$
3. C$2373\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$
4. D$3811\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$