What Is the Enthalpy Change for the Following Reaction (The

question 22

Multiple Choice

What is the enthalpy change for the following reaction (the reaction of ethane with hydrogen bromide to form bromoethane) :
CH₂CH₂ + HBr  CH₃CH₂Br
Use the following bond energies where appropriate:
C-H = 412 kJ mol^-1; C-C = 348 kJ mol^-1; C=C = 610 kJ mol^-1; H-Br = 365 kJ mol^-1; C-Br = 280 kJ mol^-1.

• A) 65 kJ
• B) -65 kJ mol^-1
• C) 5311 kJ mol^-1
• D) 65 kJ mol^-1
• E) -327 kJ mol^-1