![](https://img.xkw.com/dksih/QBM/2020/1/14/2376942165516288/2377574748078080/STEM/bb49778f61dd4fcfbe578d8fd11b218a.png?resizew=35)
(1)此反应平衡常数表达式为
(2)能说明反应已达平衡状态的是
A.浓度c(Z)=2c(Y2) B.容器内压强保持不变
C.v逆(X2)=2v正(Y2) D.容器内的密度保持不变
(3)若将上述容器改为恒压容器
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
相似题推荐
(1)已知2NO(g)+O2(g)⇌2NO2(g)的反应历程分两步:
第一步 2NO(g)⇌N2O2(g) (快速平衡)
第二步 N2O2(g)+O2(g)=2NO2(g) (慢反应)
用O2表示的速率方程为v(O2)=k1∙c2(NO)∙c(O2);NO2表示的速率方程为v(NO2)=k2∙c2(NO) ∙c(O2),k1与k2分别表示速率常数(与温度有关),则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/476bfa164b7b51962c95f2723d03749f.png)
(2)容积均为1L的甲、乙、丙三个容器,其中甲为绝热恒容,乙为恒温恒容,丙为恒温恒压。相同温度下,分别充入0.2mol的NO2,发生反应:2NO2(g)⇌N2O4(g) ΔH<0,甲中NO2的相关量随时间变化如图所示。
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/25393603-e82c-4788-bff5-58b24e8ad965.png?resizew=372)
①0~3s内,甲容器中NO2的反应速率增大的原因是
②甲达平衡时,温度若为T℃,此温度下的平衡常数K=
③平衡时,平衡常数K甲、K乙、K丙的大小关系是
(3)以NH3为还原剂在脱硝装置中消除烟气中的氮氧化物。
主反应:4NH3(g)+4NO(g)+O2(g)=4N2(g)+6H2O(g) ΔH1=-1626.9kJ/mol
副反应:4NH3(g)+3O2(g)=2N2(g)+6H2O(g) ΔH2=-1267.1kJ/mol
4NH3(g)+5O2(g)=4NO(g)+6H2O(g) ΔH3=-907.3kJ/mol
将烟气按一定的流速通过脱硝装置,测得出口NO的浓度与温度的关系如图所示,试分析脱硝的适宜温度范围
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/6847a66a-fe79-426d-b5a0-d5fb7221d28c.png?resizew=269)
![](https://img.xkw.com/dksih/QBM/2020/10/20/2574960288841728/2575716147732480/STEM/1aafacde5d144174bce4f3eb6ae03c40.png?resizew=23)
②2HI(g)
![](https://img.xkw.com/dksih/QBM/2020/10/20/2574960288841728/2575716147732480/STEM/1aafacde5d144174bce4f3eb6ae03c40.png?resizew=23)
在某温度下,向一固定体积密闭容器中,投入足量NH4I固体(忽略体积),达到化学平衡时,测得P(H2)=5Kpa、P(HI)=40Kpa,请填写以下空白:
(1)请写出NH4I(s)分解为H2(g)、I2(g)和NH3(g)的热化学反应方程式
(2)在相同温度下,在如图的装置中达到化学平衡。
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/62cc9313-c1d4-4321-b7aa-0d630202e79f.png?resizew=72)
若缓慢将体积扩大至2V,反应②向
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510d78f043fb17e518c70fd58fd4b36a.png)
【推荐3】氮有多种氧化物,它们在生产、科研中有丰富的应用。
(1)某条件下密闭容器中充入了2molN2O4气体,现测得NO2的浓度数据如下:
时间(min) | 1min | 2min | 3min | 4min | 5min |
NO2浓度(mol/L) | 0.8 | 1.4 | 1.8 | 2.0 | 2.0 |
则NO2在2-4min内的反应速率为
(2)碘蒸气存在能大幅度提高N2O的分解速率,反应历程为:
第一步I2(g)2I(g)(快反应)
第二步I(g)+N2O(g)→N2(g)+IO(g)(慢反应)
第三步IO(g)+N2O(g)→N2(g)+O2(g)+I(g(快反应)
实验表明,含碘时N2O分解速率方程v=k·c(N2O)·c0.5(I2)(k为速率常数)。下列表述正确的是
A.第一步反应对总反应速率起决定作用 B. 第二步活化能比第三步大
C.N2O分解反应中,k(含碘)>k(无碘) D.I2浓度与N2O分解速率无关
(3)已知N2O(g)+CO(g)CO2(g)+N2(g) △H=-124 kJ/mol,为研究汽车尾气转化为无毒无害物质的有关反应,在密闭容器中充入10 molCO和10 molN2O发生反应,如图所示为平衡时N2O的体积分数与温度、压强的关系。
①该反应达平衡后,为了在提高反应速率同时提高N2O的转化率,可采取的措施
a.改用高效催化剂 b.缩小容器的体积 c.升高温度 d.增加CO的浓度
②压强为20 MPa、温度为T2下,若反应进行到20 min达到平衡状态,请计算该温度下平衡常数K=
③若在D点对反应容器升温的同时缩小体积至体系压强增大,重新达到的平衡状态可能是图中A-G点中的
t℃ | 700 | 800 | 850 | 1000 | 1200 |
K | 2.6 | 1.7 | 1.0 | 0.9 | 0.6 |
(1)该反应的正反应为
(2)在某温度下,能判断该反应是否已经达到化学平衡状态的是:_______
A.容器中压强不变 | B.混合气体中CO浓度不变 |
C.v(H2)正 = v(H2O)逆 | D.c(CO2) = c(CO) |
时间/min | CO2 (mol/L) | H2 (mol/L) | CO (mol/L) | H2 O ( mol/L) |
0 | 0.200 | 0.300 | 0 | 0 |
2 | 0.138 | 0.238 | 0.062 | 0.062 |
3 | c1 | c2 | c3 | c3 |
4 | c1 | c2 | c3 | c3 |
计算:3min—4min达到平衡时CO的平衡浓度c3是
![](https://img.xkw.com/dksih/QBM/2021/10/25/2836988487999488/2840519421419520/STEM/b905c217-6539-4cc7-8bb0-8c69de23c68e.png?resizew=190)
(1)该反应的化学方程式可表示为
(2)反应起始至
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf98e424dd8f88303203bf2085d18a9.png)
(3)下列可判断反应已达到该状态的是_______(填字母,下同)
A.X、Y,Z的反应速率相等 | B.X、Y的反应速率比为2:3 |
C.混合气体的密度不变 | D.生成![]() ![]() |
(5)一定能使该反应的反应速率增大的措施有
A.其他条件不变,及时分离出产物 B.适当降低温度 C.其他条件不变,增大X的浓度
I.结合下图回答问题
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/22/63c9f545-8a1b-40f2-b186-65b15fddd62f.png?resizew=271)
(1)图中三种分子最稳定的是
(2)若反应生成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db4ee469923bd1e9e9efb1c22a28549.png)
Ⅱ.某温度时,在一个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdbcfa56af123635b4f5bae5908df69.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/22/6413df17-b8c8-4d29-ae7f-a26ed52847b6.png?resizew=238)
(3)该反应的化学方程式为
(4)从开始至
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc90c7282eb39191a94135f64187c214.png)
Ⅲ.已知:“零级反应”是指反应速率与反应物浓度无关的化学反应。某温度下,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf0295adab7a69310bf19b31f138b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b91c0475db34bbf62a8a00b85e7cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed19e36e2a457872cbba747cdf1871f8.png)
时间段![]() | 产物Z的平均生成速率![]() |
0~2 | 0.20 |
0~4 | 0.15 |
0~6 | 0.10 |
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9504a819e9225ac8743c8c0809492370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b725876d641438fd39817eaa4300133.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc90c7282eb39191a94135f64187c214.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97838474d4b88b0006ad1ad4494f95d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3390f66ebec89af79c9b8246d9db9912.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/962a71e2295bc695d53cdf665d2a16d3.png)
⑤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38eb02bd17fb4f4b8126389aeca0ea9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c3cc5bae5ab681af9f5ff3c5011316.png)
⑥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541b7e316b778f5fe7d443f8fde54776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e6415115b8caee3ddb5fde1037c785.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982f3eb42fdd2bb91dc41cd610c99926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d085d24a2c98b5842f83b609e6ea1392.png)
反应时间![]() | 0 | 5 | 10 | 15 | 20 | 25 | 30 |
压强![]() | 16.80 | 14.78 | 13.86 | 13.27 | 12.85 | 12.60 | 12.60 |
2.反应后的气体总物质的量是
3.则从反应开始到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/960d528294948c3bbbdde7d9f942dbc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7644a7769a5fa1bdab46cc0b2dee2861.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
4.实验中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a628160b971aca3528d447882fa45fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58453e277815a9e6bb2682460ce85f0.png)
A.增大 B.减小 C.不变
5.实验中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a628160b971aca3528d447882fa45fe.png)
A.正向移动 B.逆向移动 C.不移动
6.改变条件能改变合成氨的反应速率,下列改变的条件中能降低反应物所需能量的是 。
A.温度 | B.压强 | C.浓度 | D.催化剂 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5a122e25cf4eb9f03ffe5ec823bfc31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7044bc7e5e2bd0d89ebc293ac61a62ba.png)
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893686510780416/2917677413818368/STEM/213c5ad3-14af-4934-89ad-3bd248c98342.png?resizew=198)
回答下列问题:
(1)从图中可知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa24a8004d0095ac9d9382113732970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85242e455a682eb4aa47abd6fb6af8fc.png)
(2)该反应的平衡常数表达式为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be67926dcdcae9406c284c19b51258b9.png)
(3)该反应在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/123ead330662d5881d826b83ee2f75d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/086949eaa1a4077ac98a2373e6dabba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0b33a54305f31a822cbdb59dd2ee908.png)
(4)该反应的焓变
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2922ae637886073827dff8c97681427.png)
(5)处于A点的反应体系从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa24a8004d0095ac9d9382113732970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85242e455a682eb4aa47abd6fb6af8fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a220f8e110269ca47643b2618416c2a1.png)
(6)在其他条件不变的情况下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa24a8004d0095ac9d9382113732970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7044bc7e5e2bd0d89ebc293ac61a62ba.png)
(1)如图是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1717aaaeb932b0adbd64cefdac0a5aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc0ce3c8bb90cfdbbf8e64b0b6e0fec7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71c86dcd9a9e9b09bbbb65b9d313435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9110e80d125190c4b5bed606e1fc2220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82c65c7b19bb33cfa1ab29fededa8f2.png)
![](https://img.xkw.com/dksih/QBM/2021/12/15/2873100617007104/2920386654150656/STEM/24f6295b-5661-43eb-a93e-db9d0d4c909a.png?resizew=264)
(2)捕碳技术(主要指捕获
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71c86dcd9a9e9b09bbbb65b9d313435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1163bc05a73653778b05c45aed88addc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6504d3ee9d7c55bb9ba21e9d7cacda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71c86dcd9a9e9b09bbbb65b9d313435.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a483e4e019bef4e537a3dc4b8b11fd2e.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6200a0f883a6e6079e8bc69e38fe71dc.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a44b36fb32d1dcf7e4bd78b642667c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1554b45cfdbc59d629b34bf21a8aa139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbb5d519f981a09188dc18a765e8c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3396e9e066adc1d6e03779938058a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27d3d85459fd9f18216c493e244e9d77.png)
如果上述三个反应的平衡常数依次为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427c073bed61b4e2aa1d64ebc26040d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c540d7928f470eaec2899e27592611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/697bbf3d7614c23def06226484cea9b7.png)
(3)已知在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7889f265b1bac6f19624eb93f5dbdc.png)
次氯酸 | 碳酸 |
![]() | ![]() ![]() |
请写出少量二氧化碳气体通入次氯酸钠溶液中的离子方程式:
(4)氯化铝水溶液呈酸性,原因是(用离子方程式表示):
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2803bfe51a41a74f4fa6215f7fa0958b.png)