AP EAMCET Engineering 21 Apr 2019 Shift 2 Paper

The reaction of chlorine on gain of electron is given as
Cl(g)+e−→Cl−(g)
It is given the ground state of Cl(g) is xkJmol−1
It is assumed the ground state of Cl−(g) is ykJmol−1
The electron gain enthalpyis given as,
∆egH=Ep−ER
−349‌kJ∕mol=y−x
y=(x−349)kJ∕mol