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氯原子对O 3 的分解有催化作用:O 3 +Cl=ClO+O 2 ΔH 1 ,ClO+O=Cl+O 2 ΔH 2 。大气臭氧层的分解反应是:O 3 +O=2O 2 ΔH,该反应的能量变化如图所示,则下列叙述正确的是( )。 ①反应O 3 +O=2O 2 的ΔH=E 1 -E 3 ②反应O 3 +O=2O 2 是放热反应 ③ΔH=ΔH 1 +ΔH 2 ④大气层中的臭氧无法再生
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