7.
氯原子对\(\rm{O}\)\(\rm{{\,\!}_{3}}\)分解有催化作用:\(\rm{O}\)\(\rm{{\,\!}_{3}}\)\(\rm{+Cl═ClO+O}\)\(\rm{{\,\!}_{2}}\) \(\rm{ΔH}\)\(\rm{{\,\!}_{1}}\),\(\rm{ClO+O═Cl+O}\)\(\rm{{\,\!}_{2}}\) \(\rm{ΔH}\)\(\rm{{\,\!}_{2}}\),大气臭氧层的分解反应是:\(\rm{O}\)\(\rm{{\,\!}_{3}}\)\(\rm{+O═2O}\)\(\rm{{\,\!}_{2}}\) \(\rm{ΔH}\),该反应的能量变化示意图如图所示,下列叙述中,正确的是\(\rm{(}\) \(\rm{)}\)