One of the steps in the formation of monochloromethane (Example 10-15) is the reaction of a gaseous chlorine atom (a chlorine radical) with a molecule of methane. The products are an unstable methyl radical and HCl(g). Is this reaction endothermic or exothermic?

Example 10-15

The reaction of methane (CH₄) and chlorine produces a mixture of products called chloromethanes. One of these is monochloromethane, CH₃Cl, used in the preparation of silicones. Calculate Δ_rH for the reaction

Transcribed Image Text:

CH4 + Cl(g) .CH3(g) + HCI(g)