问题 填空题

在一定体积的密闭容器中,进行如下化学反应:CO2(g)+H2(g)CO(g)+H2O(g)。其化学平衡常数K和温度T的关系如下表:

T℃70080083010001200
K0.60.91.01.72.6

回答下列问题:

(1)该反应正向为ΔH    0;若该反应符合下图所示的关系,则在图中,Y轴是指                        。 

(2)能判断该反应达到化学平衡状态的依据是    (多选扣分)。

a.容器中压强不变               b.混合气体中c(CO)不变

c.v (H2)=v (H2O)             d.c(CO2)=c(CO)

(3)某温度下,平衡浓度符合下式: 0.9·c(CO2)·c(H2)=c(CO)·c(H2O),由此可以判断此时的温度为     ℃。其它条件不变,升高温度,原化学平衡向     反应方向移动(填“正”或“逆”),容器内混合气体的密度      (填“增大”、“减小”或“不变”),气体平均相对分子质量      (填“增大”、“减小”或“不变”)。

(4)若在一密闭容器中,将一定量的CO与H2O混合加热到830℃下达到平衡。若反应开始时CO与H2O的浓度分别为0.200 mol/L和0.100 mol/L,平衡时CO的转化率        

答案

(1)>(1分);CO2或H2的百分含量(1分)(其它合理答案也给分)

(2)b、c (漏选、多选、错选均不得分,2分)

(3)800℃; 正; 不变; 不变(各1分)

(4)33.3%(2分)

写作题

第二节 读写任务(共1小题,满分25分)

请根据以下的任务说明和写作要求,写一篇150词左右的英语短文。

[阅读材料]               Speaking Mandarin Chinese

In China, there are over 100 different dialects, which are so complicated that even people from neighboring villages may not understand each other. In the information age, such barrier of language must be removed by popularizing Mandarin because it inversely affects the quality and efficiency of oral communication.

We have many things to do in Mandarin popularization. First, we should carry out a mass education on the importance of speaking Mandarin to make everyone understand that it is his responsibility to do so. In the past, little progress has been made in isolated rural areas because the natives do not bother to take pains to learn to speak Mandarin. Next, speaking good Mandarin should be compulsory in classrooms, in public offices, in movies and TV programs in China. Finally, we should attach great importance to public education because China has large illiterate(文盲的)population. A poorly educated nation has no international reputation. Popularizing Mandarin is only the first step in changing China into a better-educated nation.

Popularizing Mandarin is of great importance because it may push up our economic growth, accelerate the development of science and technology, and promote the unification of China. With a population of over 1.3 billion people, it is not an easy task. But we must do it and do it effectively.

[任务说明] 你要参加一场英语演讲比赛,主题是“如何处理好普通话与方言的关系”。在参赛之前,你要查阅相关资料,并准备你的演讲发言。请认真阅读下面的短文,然后完成以下的任务。

1)概括短文的内容要点,该部分的字数大约30字;

2)就“如何出来好普通话与方言的关系”这个主题发表你的看法,至少包括以下的内容要点,该部分的字数大约120字;

a) 说说你到外地或者外地人到本地在语言上所碰到的困难。

b) 你同意全国推广普通话吗?为什么?

c) 你认为有必要保留地方方言吗?为什么?

d) 如何处理好普通话与地方方言的关系?

[写作要求]  你可以使用实例或其它论述方法支持你的论点,也可以参照阅读材料的内容,但不要抄袭阅读材料中的句子。

单项选择题