Question

If ionization energy of chlorine is 349 then electron gain enthalpy will be

Answer 1

The electron gain enthalpy of chlorine is -349 kJ mol -1 . 35.5 g of Chlorine releases -349 kJ/mol of energy in gain of one electron, to from chloride ion. Therefore, 3.55 g of chlorine will release (-349x3. 55)/35.5 = -34.9 kJ/mol of energy.