Calculate the heat of atomization to convert a molecule

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Problem- Calculate the heat of atomization (the heat required to convert a molecule in the gas phase into its constituent atoms in the gas phase) ofC2HCl, using the average bond energies in the following table:

Bond energy

C-C 347 C=C 611 C=C 837 H-C 414 C-Cl 339 H-Cl 431

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