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Hess' Law

How many step...

Question

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

A

4

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B

5

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C

6

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D

7

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Solution

The correct option is B 5
The process involves the following 5 steps

Sublimation of Solid $N a$

Dissociation of $C l_{2}$ molecule

Ionisation of $N a$ atoms (ionisation energy)

Formation of $C l^{-}$ ions (electron affinity)

Formation of solid $N a C l$ from gaseous ions (lattice energy)

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