What is the value of electron gain enthalpy of Na if IE of Na = 5.1 eV??????IE = ionisation enthalpy

What is the value of electron gain enthalpy of Na if IE of Na = 5.1 eV

1.	What is the value of electron gain enthalpy of Na if IE of Na = 5.1 eV??????IE = ionisation enthalpy
Answer» Hey dude the valence SHELL of an isolated gaseous atom in its ground state resulting in the FORMATION of ion whereas, electron gain enthalpy is the amount of ENERGY associated with the gain of ELECTRONS by the isolated gaseous atom. So,it is opp. of I.E Hence,if I.E of Na=5.1 its Electron Gain enthalpy will be -5.1