Using the Bond Dissociation Energies Given, Calculate ?H° for the Following

question 20

Multiple Choice

Using the bond dissociation energies given, calculate ?H° for the following reaction. $$\mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } - \mathrm { Br } + \mathrm { H } _ { 2 } \mathrm { O } \longrightarrow \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } - \mathrm { OH } + + \mathrm { HBr }$$ Bond A-B ?H° KJ/mol
CH₃CH₂-Br
285
H-OH
498
CH₃CH₂-OH
393
H-Br
368

• A) +108 KJ/mol
• B) -130 KJ/mol
• C) -22 KJ/mol
• D) +22 KJ/mol

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