题干

公元前18世纪某国王就宣布“从今往后,任何一个受害者都可以走到我所立的这座‘公正之主’石碑前,亲自读碑上内容,或者听别人念其中的条款,让我的石碑使他看清他所面临的纠纷。认清他所当得到的权利,从而获得安慰。”此国王是(    )

A:胡夫

B:伯里克利

C:汉谟拉比

D:穆罕默德

上一题 下一题 0.0难度 选择题 更新时间:2014-03-27 05:44:15

答案(点此获取答案解析)

C

同类题1

合成氨工业对国民经济和社会发展具有重要的意义.其原理为:

N2(g)+3H2(g)⇌2NH3(g)△H=﹣92.4kJ/mol   据此回答以下问题:

(1)合成氨工业采取的下列措施中,不能用勒沙特列原理解释的是____ (填序号).

①反应压强为20Mpa~50Mpa   ②500℃的高温    ③铁触媒作催化剂   ④将生成的氨液化并及时从体系中分离出来,未反应的N2、H2循环到合成塔中.

(2)一定条件下NH3的平衡体积分数随n(N2)变化如图所示(T﹣温度).则T2____ T1(填>、=、<),判断的依据是:____ 

(3)合成氨气所需的氢气可以由水煤气分离得到.涉及反应信息如下:

反应一:C(s)+H2O(g)⇌H2(g)+CO(g)   平衡常数K1

反应二:CO(g)+H2O(g)⇌H2(g)+CO2(g)  平衡常数K2

①K1的表达式:K1= ____ . 

②将一定量的H2O(g)和CO(g)分别通入到体积为1L的密闭容器中,在不同条件下进行反应,得到以下三组数据:

实验组别

温度/℃

起始量/mol

平衡量/mol

达到平衡所需时间/min

H2O

CO

H2

CO

1

650

1

2

0.8

1.2

5

2

900

0.5

1

0.2

0.8

3

3

T

a

b

c

d

t

(Ⅰ)实验1中,用CO2表示反应开始到平衡的平均反应速率为____ 

(Ⅱ) 在实验3,当a=0.5、b=1时,要使c、d数据与实验2相同,且t<3,可以采取的措施为____ (填序号)

A.其它条件不变温度T<900℃B.其它条件不变温度T>900℃

C.充入一定量氖气                    D.使用高效催化剂

(Ⅲ)对于反应二,当升高温度时K2____ (填“增大”、“减小”或“不变”).


同类题3

阅读理解

    The team I work in just has 2 new interns(实习生), and I happen to be their supervisor.

    After today's lunch break, I saw that one of them was reading things on her smart-phone, maybe on some social network, I guessed. I went to her and said “There's another document here needing translation. Do you have time to finish it for me?”

    That document was not in her assigned workload. But I thought I could let her challenge herself a little bit with it, seeing that she seemed to have time.

    “Yes, I do have time.” She said, “But I'm just an intern.”

    I didn't quite know what to say back then. After a while I mumbled(咕哝) “Right. Yes.” And I turned around and left.

    I recalled the time when I was an intern for the first time. I, too, managed to finish my workload so fast, just like her. So I asked my supervisor “Is there anything else that I can help?” And she happened to have a plan to make. But she didn't have time. So she let me do the research and make a draft for her.

    I was not very familiar with the job but still tried to carry it out based on my understanding and make it as professional as possible. And my supervisor was really satisfied with the draft. Later, she told me “You saved me a lot of time. I didn't need to create it from scratch.” And she told me in details how I should have done the plan differently. I learned a lot about the operation in the process. After that, she had come to trust me completely. I got my current job all because of her recommendation.

    Yes, I was just an intern with a low salary. But I bought a better future with my extra labor.

    There's a kind of poverty called shortsightedness.