ORGANIC CHEMISTRY Chapter 10 Reaction of methane with other halogens △H°( kJ/mol) Chain initiation X=F CI Br 2X. +159+243+192+151 Chain Propagation CH3-H+X·→CH3+HX134+4+69+138 CH3 t X2 CH3X+X.29310610084 Overall 4△H°=42710231+54 Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 10 Reaction of methane with other halogens hv X2 2X ∆H° (kJ/mol) Chain Initiation CH3 ＋ HX CH3 ＋ X2 CH3X ＋ X CH3 H ＋ X Chain Propagation X= F Cl Br I +159 +243 +192 +151 134 +4 +69 +138 293 106 100 84 Overall ∆H° = 427 102 31 +54