Calculate the enthalpy of formation of aniline. The enthalpy of combustion of aniline is `837.5 kcal mol^(-1)`. The enthalpies of formation of liquid water and gaseous carbon dioxide are `-68.4` and `-97.0kcal mol^(-1)` respectively. All values are at `298 K`.

Explanation

To calculate the enthalpy of formation of aniline (C₆H₅NH₂), we will use the enthalpy of combustion and the enthalpies of formation of the products formed during the combustion reaction. Here’s how to do it step by step:

### Step 1: Write the combustion reaction of aniline
The combustion of aniline can be represented as follows:

\[ \text{C}_6\text{H}_5\text{NH}_2 + \frac{31}{4} \text{O}_2 \rightarrow 6 \text{CO}_2 + \frac{7}{2} \text{H}_2\text{O} + \frac{1}{2} \text{N}_2 \]

### Step 2: Identify the enthalpy of combustion
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