.对于可逆反应2AB3(g)A2(g)+3B2(g) ; ΔH>0,下列图像正确的是      

.对于可逆反应2AB3(g)A2(g)3B2(g) ; ΔH0下列图像正确的是

  

 

                                                                      D

答案

【知识点】化学平衡图像 G1 G2 G3

【答案解析】D  解析:A、温度升高,平衡向正向移动,故V正>V逆,故A错误;B、温度高时先达到平衡,且温度升高平衡向正向移动,AB3%应降低,故B错误;C、当温度相同时,压强减小,平衡向正向移动,AB3%应降低,故C错误;D、当压强相同时,温度降低,平衡向逆向移动,AB3%应升高,故D正确;

【思路点拨】本题考查了化学平衡图像,难度不大,注意横纵坐标。

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