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氮及其化合物在工农业生产、生活中有着重要作用.请回答下列问题: (1)右图是N 2 和H 2 反应生成2molNH 3 过程中能量变化示意图,每生成1molNH 3 放出热量为______; (2)在体积为2L的密闭容器中,进行如下化学反应: N 2 (g)+3H 2 (g) 2NH 3 (g)△H<0,得到如下数据: 实验组 温度/℃ 起始量/mol 2分钟/mol 平衡常数 H 2 N 2 NH 3 1 298 6 2 1.2 4.1×10 6 2 398 3 1 0.8 K 1 请回答下列问题: ①反应的平衡常数表达式为______; K 1 的相对大小,K 1 ______4.1×10 6 (填写“>”“=”或“<”); ②实验1中以υ(H 2 ) 表示的反应速率为______; ③下列各项能作为判断该反应达到化学平衡状态的依据的是______(填序号字母); A.容器内N 2 、H 2 、NH 3 的物质的量浓度之比为1:3:2 B.υ(N 2 )(正)=3υ(H 2 )(逆) C.容器内压强保持不变 D.混合气体的密度保持不变 (3)NH 4 Cl溶液呈酸性,这是由于NH 4 + 水解的缘故.则NH 4 Cl在重水(D 2 O)中水解的离子方程式是______.
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参考答案:
举一反三
【单选题】下列不属于男性内生殖器的是
A.
阴茎
B.
附睾
C.
睾丸
D.
前列腺
【单选题】向含有Cu(NO 3 ) 2 、Zn(NO 3 ) 2 、Fe(NO 3 ) 3 、AgNO 3 各0.1mol的混合溶液中加入0.1molFe,充分搅拌后Fe溶解,溶液中不存在Fe 3+ ,同时析出0.1mol Ag..下列结论错误的是(  )
A.
氧化性:Zn 2+ >Cu 2+ >Fe 3+ >Ag +
B.
Fe 3+ 的氧化性大于Cu 2+
C.
溶液中Cu 2+ 与Fe 2+ 的物质的量比为1:2
D.
1molFe可还原2molFe 3+
【单选题】听力原文: An American U-2 surveillance plane made its first flight over Iraq on Monday in support of the current U.N. inspection mission, marking another concession by Saddam Hussein's regime to stave off...
A.
she protests against military action.
B.
she maneuvers to show its forces.
C.
she intends to defend its country.
D.
she makes another concession.
【单选题】浅绿色的Fe(NO 3 ) 2 溶液中存在着如下的平 衡:Fe 2+ +2H 2 O Fe(OH) 2 +2H + 若在此溶液中加入盐酸,则溶液的颜色变化为 [     ]
A.
绿色变深
B.
浅绿色变得更浅
C.
变黄
D.
无明显变化
【单选题】听力原文: An American U-2 surveillance plane made its first flight over Iraq on Monday in support of the current U.N. inspection mission, marking another concession by Saddam Hussein's regime to stave off...
A.
it protests against military action
B.
it maneuvers to show its forces
C.
it intends to defend its country
D.
it makes another concession
【单选题】下列不属于男性内生殖器的是
A.
阴茎
B.
附睾
C.
睾丸
D.
前列腺
E.
精囊腺
【单选题】听力原文: General Electric reported second-quarter profits of $ 5.4 billion Friday and said it was getting out of the U.S. mortgage business. Profits for the quarter ending June 30 were up by more than 10...
A.
$ 5.4 billion
B.
$4.9 billion
C.
$0.5 billion
D.
$10.3 billion
【简答题】E Babies are not just passing idle time when they stare goggle-eyed at the television—they are actually learning about the world, U.S. researchers said. Parents may want t limit what their babies see ...
【单选题】下列不属于男性内生殖器的是
A.
阴茎
B.
睾丸
C.
精囊腺
D.
前列腺
【单选题】浅绿色的Fe(NO 3 ) 2 溶液中存在着如下的平衡:Fe 2+ +2H 2 O Fe(OH) 2 +2H + 若在此溶液中加入稀硫酸,则溶液的颜色变化为(    )
A.
绿色变深
B.
浅绿色变得更浅
C.
变黄
D.
无明显变化
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