6. Thermodynamics and Kinetics
Enthalpy
Problem 20b
Textbook Question
Textbook QuestionWhen a small amount of iodine is added to a mixture of chlorine and methane, it prevents chlorination from occurring.
Therefore, iodine is a free-radical inhibitor for this reaction.
Calculate ΔH° values for the possible reactions of iodine with species present in the chlorination of methane,
and use these values to explain why iodine inhibits the reaction.
(The I―Cl bond-dissociation enthalpy is 211 kJ/mol or 50 kcal/mol.)
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