(8分) (1)已知:N2(g)+O2(g)=2NO(g); △H=+180.5

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问题:

(8分)

(1)已知:N2(g)+O2(g)=2NO(g); △H=+180.5 kJ·mol-1

4NH3(g)+5O2(g)=4NO(g)+6H2O(g);△H="-905" kJ·mol-1

2H2(g)十O2(g)=2HO(g):△H=--483.6 kJ·mol-1

则N2(g)+3H2(g)2NH3(g)的△H=           

(2)在一定条件下,将2mol N2与5mol H2混合于一个10 L的密闭容器中,反应情况如图1所示:

①求5min内的平均反应速率v(NH3              

②达到平衡时NH3的体积分数为                      

(3)近年来科学家采用高质子导电性的SCY陶瓷(能传递H+)为介质,用吸附在它内外表面上的金属钯多品薄膜做电极,实现了高转化率的电解法合成氨(装置如图2)。钯电极A上发生的电极反应式是                  。  

考点:达到化学平衡的标志影响化学平衡的因素化学平衡常数
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上海期货交易所铜期货合约集中交割的交割期是指合约月份的16~20日。因最后交易日遇法定假日顺延的或交割期内遇法定假日的,均相应顺延交割期,保证有5个交割日。()

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阅读下面的短文,然后以约 30 个词概括故事的主要内容。

Who says honesty is dead? Last Tuesday morning Alan Reed, a student, was at the bank. He asked to take out $ 50 but the bank clerk mistakenly gave him five twenties instead of five tens. For a few seconds he wondered what to do. Should he give the extra money back? Keep it? If he kept it, he could buy several new books, or he could take his friend Alice to a fancy dinner. Probably no one would ever notice. Besides, this would make up for all the times he’d been overcharged. But then he looked at the clerk. She was a middle-aged woman with a sweet face, and she reminded him of his mother. She had been nice to him, and she looked pressured in her work. Then it occurred to him that the lady would probably get in trouble. Worst of all, Alan felt, he would probably feel guilty about keeping the extra cash. So Alan gave back the money.

The bank clerk was so impressed that someone was honest enough to return money not rightfully his that she contacted the newspaper. So there you have it. What would you have done if you’d been in Alan’s position?

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BOT和BOOT的区别在于()。

A、BOT在特许期内既拥有经营权也拥有所有权

B、BOOT在特许期内既拥有经营权也拥有所有权

C、BOT在经营期满后不需要将设备移交给东道国政府

D、BOOT在经营期满后不需要将设备移交给东道国政府

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患儿,4岁。其母患浸润性肺结核,该患儿近半个月低热,咳嗽,疑为结核病,做OT试验:1:2000,其硬结直径为21mm,结果为

A."-"
B."+"
C."++"
D."+++"
E."++++"

题型:填空题

中年人对自我的看法( )。

A.表现出消极的变化

B.与青年期相比没有什么变化

C.表现出更加积极的、满意的变化

D.因人而异

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