The second ionization enthalpy of calcium is more than the first. How is that calcium forms CaCl2 and not CaCl give reasons.

The second ionization enthalpy of calcium is more than the first. How

1.	The second ionization enthalpy of calcium is more than the first. How is that calcium forms CaCl2 and not CaCl give reasons.
Answer» The higher value of second ionization enthalpy is more than compensated by the higher enthalpy of hydration of Ca²⁺. Therefore formation of CaCl₂becomes more favorable than CaCl energetically.