在一体积可变的密闭容器中,加入一定量的X、Y,发生反应mX(g)nY(g) ΔH

题型:选择题

问题:

在一体积可变的密闭容器中,加入一定量的X、Y,发生反应mX(g)nY(g) ΔH="Q" kJ·mol-1。反应达到平衡时,Y的物质的量浓度与温度、气体体积的关系如下表所示:

        气体体积/L

c(Y)/(mol·L-1)   

温度/℃        

123
1001.000.750.53
2001.200.900.63
3001.301.000.70
 

下列说法正确的是(  )

A.m>n

B.Q<0

C.温度不变,压强增大,Y的质量分数减小

D.体积不变,温度升高,平衡向逆反应方向移动

考点:化学平衡的有关计算影响化学平衡的因素达到化学平衡的标志化学平衡常数
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小题1: Henry is not happy because his English is very poor. He wants to learn English well. What can he do?

小题2: Levy likes traveling very much. She wants to go to visit a western country.

小题3: Mike lives in China. But he doesn’t like the Chinese food. He wants to have western food every day.

小题4:Cindy is from Australia. She lives in Guangzhou now. She wants to learn how to sing Cantonese(广东的) songs.

小题5: John is visiting a strange (陌生的) city. He wants a hotel to live in. He just has 300 yuan.

A.Cantonese Food

In China, Cantonese food is very famous. Many Chinese like it. Our restaurant opens from 9 am to 10 pm every day.

B.The United Kingdom

The United Kingdom is a very beautiful western country. You can go traveling there.

C.Binbin Learning Center

Do you like Cantonese music? The teachers here are very good. You can learn how to sing Cantonese songs.

D.KFCHere you can have delicious western food—chicken, French fries and ice cream. You must like them.

E. Xinglong Hotel

The rooms in our hotel are very big, but they are not expensive. Just 150 yuan a night. Welcome!

F. Language Classes

Here are many language classes for you—English classes, French classes and Japanese classes. Come and enjoy your learning.

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