合成氨对化学工业和国防工业具有重要意义．（1）向合成塔中按1：4的物质的量之比充入N2、H2进行氨的合成，图A为T℃时平衡混合物中氨气的体积分数与压强（P）的关系图．①写出工业上合成氨的化学方程式_1

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合成氨对化学工业和国防工业具有重要意义．

（1）向合成塔中按1：4的物质的量之比充入N₂、H₂进行氨的合成，图A为T℃时平衡混合物中氨气的体积分数与压强（P）的关系图．

①写出工业上合成氨的化学方程式____

②图A中氨气的体积分数为15.00%时，H₂的转化率=____

③图B中T=500℃，温度为450℃对应的曲线是____ （选填字母“a“或“b”），选择的理由是____

④由图象知，增大压强可提高原料的利用率，从生产实际考虑增大压强需解决的问题是____ （写出一条即可）．

（2）合成氨所需的氢气可由甲烷与水反应制得，反应的热化学方程式为：

CH₄（g）+H₂OCO（g）+3H₂（g）；△H=+QkJ/mol（Q＞0）

（3）一定温度下，在2L容器中发生上述反应，各物质的物质的量变化如下表

时间/min	CH₄（mol）	H₂0（ mol）	CO （mol）	H₂ （mol）
0	0.40	1.00	0	0
5	X₁	X₂	X₃	0.60
7	Y₁	Y₂	0.20	Y₃
10	0.21	0.81	0.19	0.62

①分析表中数据，判断5〜7min之间反应是否处于平衡状态____ （填“是”或“否”），

前5min平均反应速率v（CH₄）=____

②反应在7～10min之间，CO的物质的量减少的原因可能是____ （填字母）．

a·减少CH₄ b·降低温度c·增大压强d·充入H₂

③若保持温度不变，向1L容器中起始充入0.15mol CH₄.0.45mol H₂O．____ mol CO、____ mol H₂，达到平衡时CH₄的体积百分含量与第一次投料相同．

上一题下一题 0.0难度选择题更新时间:2019-04-07 01:10:15

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N₂+3H₂2NH₃,24.45%,b,\u5408\u6210\u6c28\u7684\u6b63\u53cd\u5e94\u662f\u653e\u70ed\u53cd\u5e94\uff0c\u6839\u636e\u52d2\u590f\u7279\u5217\u539f\u7406\uff0c\u5176\u4ed6\u6761\u4ef6\u4e0d\u53d8\uff0c\u964d\u4f4e\u6e2

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阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出一个最佳选项。
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We had just been to the gym and stopped to eat at the restaurant.
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    He had a full plate of vegetables and tofu. He didn't need a piece of cake. 5 ， everything in the restaurant is quite  6 . Our dinners could have  7 a family of seven at a fast food restaurant. That cake probably  8 $5.
    He was silent as he looked at the delicious cakes. I had forgotten that I had walked over to the cake shelf while he was   9 his food from the buffet (自助餐)．
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    Your kids are very   15 to put on their trays, exactly what you have on yours, and I think this applies to (适用于) more than food. Keep your life plate with only what you want your kids to have.

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