1.   The standard molar lattice enthalpy is the enthalpy change which accompanies the formation of one mole of the solid ionic compound from its gaseous ions under standard conditions.

2.   This is the formation of the lattice from its gaseous ions.

3.   We can therefore write The enthalpy change that accompanies the hydration of one mole of both these gaseous ions is called the enthalpy of hydration.

4.   Finally, the components were channeled into a mass spectrometer, which sorted and identified their gaseous ions based on their behavior in electric and magnetic fields.