Question

what is ionization enthalpy ?why is the second ionisationenthalpy higher than the first ionisation enthalpy

Answer 1

Ionization enthalphy is defined as the quantity of energy that an isolated, gaseous, neutral atom must absorb to discharge an electron, resulting in a cation. The second ionization enthalphy is greater then the first ionization enthalphy as after one electron is discharged, the nuclear charge increases resulting to an increase in ionization enthalphy.