反应N2O4(g)2NO2(g)ΔH =+57 kJ·mol-1,在温度为T1、T2时,     平衡体

反应N2O4(g)2NO2(g)ΔH =+57 kJ·mol1,在温度为T1T2时,

    平衡体系中NO2的体积分数随压强(缩小体积)

    变化曲线如图所示。下列说法正确的是  (  )

   Aac两点的反应速率:a>c

   Bac两点气体的颜色:a深,c

   C.由状态b到状态a,可以用加热的方法

   Dac两点气体的平均相对分子质量:a>c

答案

C

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