Consider the halogenation of ethene, where X is a generic halogen: Use bond energies to determine which

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Consider the halogenation of ethene, where X is a generic halogen:HC=CH(g) + X(g) HXC-CHX(g)

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) IodineTABLE 10.3 Average Bond Energies Bond Energy (kJ/mol) 436 414 389 464 368 565 431 364 297 347 611 837 305 615

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