The molar enthalpy change accompanying the removal of an electron from a gas phase atom or ion in its ground state is called?

A. Electron gain enthalpy
B. Ionization enthalpy
C. Enthalpy change
D. Enthalpic gas removal

Correct Answer:

Option B = Ionization enthalpy

Explanation

– The enthalpy change associated with the removal of the first electron from an isolated gaseous atom.

– Ionization enthalpy is the minimum amount of energy required to detach from an isolated gaseous atom the most loosely bound electron and turn it into a gaseous cation.