The electron gain enthalpy of bromine is 3.36 eV. How much energy in kcal is released when 8 g of bromine is completely converted to ${{Br}^{-}}$ ions in the gaseous state?(1 eV = 23.06 kcal ${{mol}^{-1}}$).
Number of moles of Br = Given Weight / Molecular Weight = 8/80 = 0.1 mol
Therefore, required energy = 0.1 x 3.36 x 23.06 = 7.748 kcal