Find the bond energy of `S-S` bond from the following data:
`{:(C_(2)H_(5)-S-C_(2)H_(5)(g),,,,Delta_(f)H^(@)=-147KJmol^(-1)),(C_(2)H_(5)-S-S-C_(2)H_(5)(g),,,,Delta_(f)H^(@)=-201KJmol^(-1)),(S(g),,,,Delta_(f)H^(@)=222 KJ mol^(-1)):}`

Explanation

To find the bond energy of the `S-S` bond from the given data, we will use Hess's law and the provided enthalpy of formation values. Here’s a step-by-step solution:

### Step 1: Write down the given data
We have the following enthalpy of formation values:
1. For `C2H5-S-C2H5 (g)`: ΔH_f = -147 kJ/mol
2. For `C2H5-S-S-C2H5 (g)`: ΔH_f = -201 kJ/mol
3. For `S (g)`: ΔH_f = 222 kJ/mol

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