Definition

Enthalpy change when 1 Mole of an ionic compound is formed from its gaseous compounds under standard conditions

As $Δ H_{l a t}$ increases, ionic bond strength $↑$ , compound stability $↑$ .

$Δ H_{l a t}$ depends on the radii of the atom and the charge of the atom. In particular,

$Δ H_{l a t} \propto Charge of the atom$ $Δ H_{l a t} \propto \frac{1}{Radii of the atom}$

Note

$Δ H_{l a t} is always exothermic (< 0)$

Literary (Further Reading)

🪴 Quartz 4.0