【单选题】对于处于平衡状态的可逆反应:aA(g)+ bB(s)= cC(g) +dD(g) 当其他条件不变时,增大压力,C的含量减少,则( )
【单选题】对处于平衡状态的可逆反应:mA+nB↔2C+D – Q (m、n、均为) 若A是固体,其他都是气体,平衡体系加压后化学平衡不移动,则n值等于
【简答题】THE LAND during this Age of Fishes was apparently quite lifeless. Crags and uplands of barren rock lay under the sun and rain. There was no real soil—for as yet there were no earthworms which help to ...
【单选题】A application calls a Windows Communication Foundation (WCF) service with a proxy class that was generated by Visual Studio.The service binding was changed from wsHttpBinding to basicHttpBindin...
A.
Update the configuration file to use basicHttpBinding.
B.
Enable anonymous authentication for the service.
C.
Copy the configuration file elements under the element from the service back to the .
D.
Update the service reference.
【单选题】下列叙述正确的是( )。
B.
可逆反应处于平衡状态时,正反应速率等于逆反应速率
C.
可逆反应处于平衡状态时,各反应物和生成物的浓度相等
D.
平衡常数与反应物初始浓度无关,而转化率的数值却随初始浓度改变
【单选题】对于处于平衡状态的可逆反应 CaCO 3 (s) ≒ (s) + CO 2 (g) Δ H > 0 ,下列哪个条件的改变 , 可使平衡向右移动
【简答题】Complete each of the following sentences after the model with the word or phrase in brackets. Make changes or additions where necessary. Model: The machines are scattered throughou t old parts of the ...
【单选题】对于处于平衡状态的可逆反应mA(g)+nB(g)?pC(g)△H;升高温度或增大压强均可提高A的平衡转化率.下列说法正确的是( )
【单选题】下列说法中错误的是 [ ]
B.
处于化学平衡状态的可逆反应,v(正)=v(逆)≠0
D.
一定温度下,可逆反应达平衡时,其反应物和生成物的总量相等
【单选题】对于处于平衡状态的可逆反应:A(g)+2B(g) 2C(g)(正向放热)下列叙述正确的是( )
A.
增大压强,正反应速率增大,逆反应速度减小,平衡正向移动
B.
升高温度,逆反应速率增大,正反应速度减小,平衡逆向移动
C.
使用催化剂,平衡不移动,但可缩短达到平衡所需时间
D.
扩大容器的容积,平衡逆向移动,A、B的浓度增大