摘要：18．已知NO2和N2O4可以相互转化:2NO2(g) N2O4(g),△H＜0.现将一定量NO2和N2O4的混合气体通入体积为1 L的恒温密闭容器中.反应物浓度随时间变化关系如图.下列说法错误的是 A．图中共有两条曲线X和Y.其中曲线X表示NO2浓度随时间的变化 B．a.b.c.d四个点中.表示化学反应处于平衡状态的点是b和d C．反应进行至25 min时.曲线发生变化的原因是加入0.4 mol N2O4 D．若要达到与d相同的状态.在25 min时还能采取的措施是适当缩小容器体积 选择题答卷纸 请将你选定的答案在答卷纸上涂黑.如■ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 [A] [A] [A] [A] [A] [A] [A] [A] [A] [A] [A] [A] [A] [A] [A] [A] [A] [A] [B] [B] [B] [B] [B] [B] [B] [B] [B] [B] [B] [B] [B] [B] [B] [B] [B] [B] [C] [C] [C] [C] [C] [C] [C] [C] [C] [C] [C] [C] [C] [C] [C] [C] [C] [C] [D] [D] [D] [D] [D] [D] [D] [D] [D] [D] [D] [D] [D] [D] [D] [D] [D] [D] 第Ⅱ卷

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