问题 多项选择题

关于反应的热力学平衡常数,下述哪些说法是错误的:()

A.热力学平衡常数与反应体系中各物质的活度有关,对一个反应体系来说,当其内物质的活度发生变化时该反应的热力学平衡常数也会发生变化;

B.热力学平衡常数与反应体系中各物质的活度无关,但可以用反应达到平衡时体系内各物质的平衡活度进行计算;

C.热力学平衡常数与温度无关,但可以用标准状态下反应的吉布斯自由能变进行计算;

D.水的离子积KW实际上就是水离解反应的热力学平衡常数。

答案

参考答案:A, C

阅读理解

阅读下面短文,  把A-D 四个句子填入文中空白处(1-4 ),使短文内容完整正确,然后完成第5 小题.。

     The best teacher I have ever had was my eighth grade math teacher, Mr. Herr. (1) ________

     Mr. Herr always came into the classroom with a smile. Each lesson of his  was  interesting  and  full  of

surprises. (2) __________ I think it was the first time I had really been made to  think  in  high  school.  I

had hated math, but he taught me to love it! He was good at talking and  I could  always understand  what

he was trying to teach.

     Mr. Herr was really young so he acted (行动) like us, and this made our learning fun. He also listened

to us and was always ready with a kind word. (3) __________ He made every student  easy  and  happy

in his class. We thought he was the one person who really understood us.

     (4) __________ He has moved to Switzer-land. The last thing I have ever got from him was a CD that he made for me. He is the best person and the best teacher I know. I will miss him for ever.

A. He would always do something funny to make us laugh.

B. He knew how to ask questions to make us think.

C. It was a great time to have been with Mr. Herr.

D. He was cool and he was a good painter.

5. From this passage, we can learn that ______.

A. with Mr. Herr's help, I began to love math

B. Mr. Herr taught me art when I was in Grade Eight

C. Mr. Herr couldn't get along well with his students

D. once Mr. Herr gave me an expensive bag

单项选择题