Consider the halogenation of ethene, where X is a generic halogen:

Use bond energies to determine which halogen produces the most exothermic halogenation reaction with ethene.

The C—F, C—Br, and C—I bond energies are 552 kJ/mol, 280 kJ/mol, and 209 kJ/mol, respectively. Look up all other necessary bond energies in Table 10.3.

a) Fluorine 

b) Chlorine

c) Bromine 

d) Iodine

Transcribed Image Text:

H₂C=CH₂(g) + X₂(g) H₂XC-CH₂X(g)