The heat of formation of ethane is `-19.46 kcal`. Bond enegries of `H-H, C -H` and `C- C` bonds are `104.18, 99.0` and `80.0 kcal`, respectively. Calculate the heat of atomisation of graphite.

Explanation

To calculate the heat of atomization of graphite using the provided data, we can follow these steps:

### Step 1: Write the Formation Reaction of Ethane
The formation of ethane (C₂H₆) from its elements can be represented as:
\[ 2 \text{C (s)} + 3 \text{H}_2 \text{(g)} \rightarrow \text{C}_2\text{H}_6 \text{(g)} \]

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