In calculating the enthalpy change of a reaction using bond energies, the formula is:
∆H°rxn = BE(reactants) - BE(products)
The reaction is:
In the reactant side,
• 1 C=C single bonds will break
• 4 C-H single bonds will break
• 1 F-F single bond will also break
Bond breaking is an endothermic process. Therefore ∆H° will be positive.
Consider the following reaction:
Estimate the carbon–fluorine bond energy, given that the C—C bond energy is 347 kJ/mol, the C=C bond energy is 614 kJ/mol, and the F—F bond energy is 154 kJ/mol.
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Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition practice problems.