在密闭容器中发生如下反应:mA(g)+nB(g) pC(g),达到平衡后,保持温度

在密闭容器中发生如下反应:mA(g)+nB(g) pC(g),达到平衡后,保持温度不变,将气体体积缩小到原来的一半,当达到新平衡时,C的浓度为原来1.9倍,下列说法错误的是

A.m+n<p                               B.平衡向逆反应方向移动

C.A的转化率降低                                 D.C的体积分数增加

 

答案

D

解析:将气体体积缩小到原来的一半,假设平衡不移动,C的浓度为原来2倍,现在没有2倍只有1.9倍,说明向逆反应方向移动了,加压向逆反应方向移动,逆方向为体积减少的方向,m+n<p,A的转化率降低,C的体积分数减少。

 

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