How much energy in kJ is released when 7.1 g of Chlorine are completely converted to Cl$^{-}$ ions in the gaseous state?

Question

Note: The electron gain enthalpy of Cl (g) is -3.7 eV, and 1 eV = 96.49 kJ mole$^{-1}$

$\begin{array}{1 1} 71.4\;kJ \\ 35.7\;kJ \\ 757.5\;kJ \\ 96.49\;kJ \end{array}$