Write chemical equation for second step of a born - haber cycle. bai2

The second step is the atomization (sublimation) of Ba

Ba(s) → Ba(g)

Explanation:

The Born Haber cycle allows one to determine the lattice energy of an ionic solid. Lattice energy or lattice enthalpy is the enthalpy change when 1  mole of an ionic solid is formed from its gaseous ions.

In the given example of BaI2 the corresponding steps as per the Born Haber cycle would be:

Step 1) Enthalpy of Formation of BaI2

Ba(s) + I2(s) → BaI2 (s)

Step 2) Atomization of Ba

Ba(s) → Ba(g)

Step 3) Atomization of I2

I2(s) → I2(g)

Step4) IOnization of Ba(g)

Ba(g) → Ba2+(g) + 2e-

Step 5) Electron affinity of I2

I2(g) + 2e- → 2I-(g)

Step 4) Lattice energy of BaI2

Ba2+ (g) + 2I-(g) → BaI2

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