The heat of formation of `CO_(2)` and `H_(2)O` is -97 kcal and -68 kcal. The heat of combustion of benzene is -783 kcal. Calculate the heat of formation of benzene ?

Explanation

To calculate the heat of formation of benzene (C₆H₆), we can use Hess's Law, which states that the total enthalpy change during a chemical reaction is the same, regardless of the number of steps taken. We will use the given heats of formation for CO₂ and H₂O, as well as the heat of combustion for benzene.

### Step-by-Step Solution:

1. **Write the combustion reaction of benzene:**
The combustion of benzene can be represented as:
\[
\text{C}_6\text{H}_6 + \frac{15}{2} \text{O}_2 \rightarrow 6 \text{CO}_2 + 3 \text{H}_2\text{O}
...