Born Haber Cycles/Lattice Enthalpy

ΔHf - energy change when one mole of a compound is formed from its constituent elements under standard conditions and with compounds and elements in their standard states. M(s) + X(g) → MX(s) 

ΔHc - energy change when one mole of an element reacts completely with oxygen under standard conditions. 

Lattice Enthalpy - energy released when one mole of a ionic compound forms from its component ions in there gaseous states - always exo (-ve). M+(g) + X-(g) → MX(s)

Atomisation Enthalpy :-Metals-sublimation: energy used when one mole of a metal is…