对可逆反应2A(s)+3B(g) C(g)+2D(g) ΔH<0,在一定条件下达到平衡,下

对可逆反应2A(s)3B(g) C(g)2D(g) ΔH0,在一定条件下达到平衡,下列有关叙述正确的是

①增加A的量,平衡向正反应方向移动  ②升高温度,平衡向逆反应方向移动,v()减小  ③压强增大一倍,平衡不移动,v()v()不变  ④增大B的浓度,v()v() ⑤加入催化剂,B的转化率提高

A.①②             B.④           C.③       D.④⑤

答案

B

相关题目

     Lu Xun is one of the greatest Chinese writers of the 20th century. Bes
     Lu Xun is one of the greatest Chinese writers of the 20th century. Besides his famous stories, he also wrote many influential articles about the living conditions of Chinese people.    
已知定点A,B,且|AB|=4,动点P满足|PA|-|PB|=3,则|PA|的最
已知定点A,B,且|AB|=4,动点P满足|PA|-|PB|=3,则|PA|的最小值为( ) A.        B.        C.        D.5
It was the third time that he __________________ (得知) the changes of the mee
It was the third time that he __________________ (得知) the changes of the meeting. (inform)
2008年度A国和B国人口总量分别为460万和2500万人。该年度A国出
2008年度A国和B国人口总量分别为460万和2500万人。该年度A国出生并成活人口17.48万人,自然增长率为1.8%;B国死亡人口30万人,自然增长率为–0.2%。试根
如右图所示,b是由1分子磷酸、1分子碱基和1分子a构成的化合
如右图所示,b是由1分子磷酸、1分子碱基和1分子a构成的化合物,下列叙述正确的是( ) A.若m为腺嘌呤,则b肯定为腺嘌呤脱氧核苷酸 B.在禽流感病原
One of joint defence teams seized the pickpocket by the       and escorted
One of joint defence teams seized the pickpocket by the       and escorted him to the police.    A. hands        B. collar        C. hairs        D. sleeves  
--Now that you like the car so much, why not drive it back?—Well, I can’t af
--Now that you like the car so much, why not drive it back?—Well, I can’t afford __car. A. that big a    B. a that big   C. that a big    D. a big that
过故人庄 孟浩然 故人具鸡黍,邀我至田家。 绿树村边合,
过故人庄 孟浩然 故人具鸡黍,邀我至田家。 绿树村边合,青山郭外斜。 开轩面场圃,把酒话桑麻。 待到重阳日,还来就菊花。 21.“绿树村边合,青

最新题目