Question

Define electron gain enthalpy.

Answer 1

Electron gain enthalpy is sometimes also referred to as Electron affinity although there is a minute difference between them.

Electron gain enthalpy is defined as the amount of energy released when an electron is added to an isolated gaseous atom. During the addition of an electron, energy can either be released or absorbed.$\left({\Delta }_{eg}H\right)$.

Unit of electron gain enthalpy is kJ/ mol.