Given the Average Bond Energies Listed Below, Estimate D H

question 52

Multiple Choice

Given the average bond energies listed below, estimate D H for the following reaction:
C₂H₂ + Br₂→C₂H₂Br₂ D H _rxn = ??
(the H and Br atoms are bonded only to C and not each other) Average Bond Energies:
C - C₃48 kJ/mol C=C₆11 kJ/mol C º C₈37 kJ/mol Br - Br 193 kJ/mol C - H₄14 kJ/mol C - Br 276 kJ/mol

• A) - 957 kJ
• B) - 133 kJ
• C) +24 kJ
• D) +957 kJ
• E) none of these

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