The standard ethelpy of combustion at `25^(@)C` of hydrogen, cyclohexene `(C_(6)H_(10))`, and cyclohexane `(C_(6)H_(12))` are `-241,-3800`, and `-3920 kJ mol^(-1)` repectively. Calculate the heat of hydrogenation of cyclohexane.

Explanation

To calculate the heat of hydrogenation of cyclohexane, we can use the given standard enthalpies of combustion for hydrogen, cyclohexene, and cyclohexane. The heat of hydrogenation can be determined using Hess's law, which states that the total enthalpy change for a reaction is the sum of the enthalpy changes for the individual steps of the reaction.

### Step-by-Step Solution:

1. **Write the Combustion Reactions**:
- The combustion of hydrogen:
\[
2H_2 + O_2 \rightarrow 2H_2O \quad \Delta H = -241 \text{ kJ/mol}
...