[CH3H…Cl]f ■■■■■ [CH3C…CI]/ 16.7 8.3 CH3·+HC 105.4 CH3CI+CI· 反应进程 (2)+(3):CH CI CH CI HCI △H=-105.4KJ/mol 9 16.7 105.4 8.3 CH4 + Cl CH3 CH3 H Cl CH3Cl + Cl E/KJ . mol-1 + HCl [ ] [ ] CH3 Cl Cl (2)+(3) : △H = -105.4 KJ/mol ≠ ≠ 反应进程 9