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 find the heat of formation of benzene (C6H6) using the given heats of formation for CO2 and H2O, and the heat of combustion of benzene, we can follow these steps:

### Step 1: Write the formation reactions for CO2 and H2O
1. The heat of formation of carbon dioxide (CO2) is given as -97 kcal:
\[ C(s) + O_2(g) \rightarrow CO_2(g) \quad \Delta H = -97 \text{ kcal} \]

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