Question

Why ionisation enthalpy is also called ionisation potential

Answer 1

Dear student
Ionisation enthalpy is also known as ionisation potential since it is the minimum potential difference required to remove the most loosely bound electrons from an isolated gaseous cation. It is measured in units of electron volts(eV) per atom.
One electron volt is the energy acquired by an electron while moving under a potential difference of 1 volt.

Regards