Question

How many steps are involved in Born Haber cycle for sodium chloride?

• A. 4
• B. 5
• C. 6
• D. 7

Answer 1

The correct option is B 5

The process involves the following 5 steps

1. Sublimation of Solid $Na$
2. Dissociation of $C{l}_2$ molecule
3. Ionisation of $Na$ atoms (ionisation energy)
4. Formation of $C{l}^{-}$ ions (electron affinity)
5. Formation of solid $NaCl$ from gaseous ions (lattice energy)