(1)已知标况下,5.6LCH4与水蒸气完全反应时吸收51.5kJ的热量,请写出该反应的热化学方程式
(2)在150℃时2L 的密闭容器中,将2molCH4和2mol H2O(g)混合,经过15min达到平衡,此时CH4的转化率为60%。回答下列问题:
①从反应开始至平衡,用氢气的变化量来表示该反应速率v(H2)=
②在该温度下,计算该反应的平衡常数K=
③下列选项中能表示该反应已达到平衡状态的是
A.V(H2)逆=3v (CO)正 B.密闭容器中混合气体的密度不变
C.密闭容器中总压强不变 D.C(CH4)=C(CO)
(3)合成气中的氢气也用于合成氨气:N2+3H2
![](https://img.xkw.com/dksih/QBM/2018/2/7/1877418244841472/1896152608956416/STEM/0b084c4acfe04bfab71e185d5e09dd32.png?resizew=33)
容器 | 体积 | 起始物质 | 平衡时NH3的物质的量 | 平衡时N2 的体积分数 | 反应开始时的速率 | 平衡时容器内压强 |
甲 | 1L | 1molN2+3molH2 | 1.6mol | φ甲 | v甲 | P甲 |
乙 | 1L | 2molN2+6molH2 | n1 mol | φ乙 | v乙 | P乙 |
丙 | 2L | 2molN2+6molH2 | n2 mol | φ丙 | v丙 | P丙 |
A.n1=n2=3.2 B.φ甲=φ丙>φ乙 C.v乙 >v丙>v甲 D.P乙>P甲=P丙
(4)合成气可以制取甲醚,绿色电源“二甲醚-氧气燃料电池”工作原理如下图所示
![](https://img.xkw.com/dksih/QBM/2018/2/7/1877418244841472/1896152608956416/STEM/61f6c33c-1fe3-4844-be7e-05383f317e27.png)
① 电极Y 上发生的反应式为
②电池在放电过程中,电极X周围溶液的pH
相似题推荐
(1)在一定条件下,氢气在氯气中燃烧的热化学方程式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11721f8475c1aee890932c278d247cd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7baf499e5d1fdc618a3fbfd93bcd83ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f483eb8188afd27aa8f59e3f0b0ce3e.png)
(2)常温常压下,1 mol乙醇完全燃烧生成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4298cb837170c021b9f2cd4e674a6a3.png)
(3)根据盖斯定律计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b5ff0df018ead058c44459d3b56917.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216c0b5f75355682b56362372e2d6be1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fea6d04844305f6f3be84d74b4bab5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f483eb8188afd27aa8f59e3f0b0ce3e.png)
P(红磷,s)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/219560b91e62da2da3d1552220a81feb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc501d2f0d9922dffc1184d2fb3746da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f483eb8188afd27aa8f59e3f0b0ce3e.png)
则白磷转化为红磷的热化学方程式为
(4)已知破坏1 mol
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb48d11d16ae254abe4687a92dd9de1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f443c9371e5b213f1709f107174c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf1fdec7041bcb3e7cfcf5dec8a0f387.png)
(5)已知①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5297f0bc9e8eeb40999065503f8292.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbb5d519f981a09188dc18a765e8c43.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450f456fc1cbcf9d7f72a93d8d0fafd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3396e9e066adc1d6e03779938058a9.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd4cfa06c0f2c3c0a63a3425655e1136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14aa494345f61c5c935c3113dd990b8a.png)
利用上述三个反应,计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5059fe2e04e6e774063393a04651fc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4bb5ab7f13c24e73afc40e9e4ab04b.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/14aa494345f61c5c935c3113dd990b8a.png)
(6)在微生物作用的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ec42431044eb85982aefc8f0ec7175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c41754d5a6063c49f6ee429dc68065.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/122c5758-0e05-4760-bb0c-8d9fdc7e7482.png?resizew=444)
①第一步反应是
②1 mol
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aba7ad3064c457fe656f24fcc8780b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd07809296c9bb1d5b5a53155b122411.png)
(1)已知:CH4、H2和CO的燃烧热(△H)分别为-890.3kJ/mol、-285.8kJ/mol和-283.0kJ/mol,且1mol液态水汽化时的能量变化为44.0kJ。用1 m3(标准状况)的甲烷与水蒸气在高温下反应制取合成气所需的热量为 (保留整数)。
(2)在一定温度下,向体积为2L的密闭容器中充入0.40mol CH4和0.60mol H2O(g),测得CH4(g)和H2(g)的物质的量浓度随时间变化如下表所示:
物质浓度 时间/min | 0 | 1 | 2 | 3 | 4 |
CH4 | 0.2mol·L-1 | 0.13 mol·L-1 | 0.1 mol·L-1 | 0.1 mol·L-1 | 0.09 mol·L-1 |
H2 | 0 mol·L-1 | 0.2 mol·L-1 | 0.3 mol·L-1 | 0.3 mol·L-1 | 0.33 mol·L-1 |
①计算该反应第一次达平衡时的平衡常数K 。
②3min时改变的反应条件是 (只填一种条件的改变即可)。
(3)已知温度、压强、投料比X[n(CH4)/n(H2O)]对该反应的影响如图所示。
![](https://img.xkw.com/dksih/QBM/2015/5/18/1576189914996736/1576189915308032/STEM/70d25a6bfdf34f258a2f2a8eae1198e4.png)
①图1中的两条曲线所示投料比的关系X1 X2(填“=”、“>”或“<”下同)。
②图2中两条曲线所示的压强比的关系:P1 P2。
(4)以天然气(设杂质不参与反应)、KOH溶液为原料可设计成燃料电池:
①放电时,负极的电极反应式为 。
②设装置中盛有100.0mL 3.0mol/L KOH溶液,放电时参与反应的氧气在标准状况下的体积为8.96L,放电过程中没有气体逸出,则放电完毕后,所得溶液中各离子浓度由大到小的关系为 。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1761585b30d14356d6a1320c908b3e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2908beccd4bd1bb8f85666b40f38be56.png)
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe8259a372a2118b4e7c99415939a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e7704492116d4c017f8d436a81d287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d6192a332a3201d89b15abd19ca01e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3fb0ec760b7f0c18d30e39a6a800f1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3b87dbd5e79622e181601b641fa9f99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c22f8b48ed4c516e7d7554de1ff8ee.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ebb596cabdf7d1ccc915f7345eb051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940db2e9b806d2c9dbedcf14f05b9480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e7704492116d4c017f8d436a81d287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3b87dbd5e79622e181601b641fa9f99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a723212ada125ef928fce9d7b604ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ac68c255ad454565a22fca2d29ac35.png)
(2)若在绝热、恒容的密闭容器中,投入一定量的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d9d69f06be6f7af883bc93dc9b8f8de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f01e2d669fddf114634958268661f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c7eb49a823f757461cd5260757b088.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/41588a06-e1d0-4857-8ec5-3eff918f9fe2.png?resizew=543)
(3)为研究不同条件对反应(Ⅱ)的影响,在恒温条件下,向2L恒容密闭容器中加入0.2mol
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1761585b30d14356d6a1320c908b3e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2159a1cd60ff2d66f0e222ff225fdcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1761585b30d14356d6a1320c908b3e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3b7242edbe9f48541631c3be1c313b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1761585b30d14356d6a1320c908b3e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ccfdc1cab57e12cf77b912d2d774c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00e9c8273f5149328e2b55ca05e3b07d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1761585b30d14356d6a1320c908b3e57.png)
(4)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2908beccd4bd1bb8f85666b40f38be56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef3eaf20da5ac48d229ca0f18137266b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de9f182dbe682a477876b55c0ab514f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30bd52fbc729100498b5300daf60350.png)
i.CH4(g)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30bd52fbc729100498b5300daf60350.png)
ii.CO2(g)+H2(g)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30bd52fbc729100498b5300daf60350.png)
iii.CO(g)+H2(g)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30bd52fbc729100498b5300daf60350.png)
(1)主反应的△H=
(2)我国学者对催化重整的主反应进行理论研究,提出在Pt-Ni合金或Sn-Ni合金催化下,先发生甲烷逐级脱氢反应,其反应历程如图1所示(*表示物种吸附在催化剂表面)。Sn-Ni合金作催化剂时该历程中最大能垒E正=
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/623556bc-fb19-4c49-a272-5965a1642607.png?resizew=650)
图1
(3)在1L恒容密闭容器中通入1molH2及一定量CO,反应iii中CO的平衡转化率随n(CO)及温度的变化关系如图2所示。
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/a81016d5-5d2c-481f-9fab-a173631ce78b.png?resizew=316)
①A、B两点对应的CO正反应速率v正(A)
②已知反应速率v正=k正·x(CO)·x(H2),v逆=k逆·x(H2O)·x(H2),k为反应速率常数,x为气体的物质的量分数,在达到平衡状态为D点的反应过程(此过程为恒温)中,当某时刻CO的转化率刚好达到60%时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff419ce8803e7a788dc55e1cf7f4ce1.png)
![](https://img.xkw.com/dksih/QBM/2018/4/29/1934395371659264/1936706054275072/STEM/d831ab9d453848e9aa6f59bd04774c27.png?resizew=485)
完成下列填空:
(1)焙烧产生的SO2可以继续制备硫酸,其中的反应之一为:2SO2+O2
![](https://img.xkw.com/dksih/QBM/2018/4/29/1934395371659264/1936706054275072/STEM/8c4bb96b24af450188dd757457a08da6.png?resizew=28)
a.1s b.5s c.10s d.50s
(2)硫铁矿焙烧后的烧渣中含有Fe2O3、Fe3O4等。酸溶后溶液中主要存在的阳离子有
(3)通入氯气时,主要反应的离子方程式为
(4)酸溶及后续过程中均需保持盐酸过量,请从水解平衡移动原理解释原因
(1)NO2可用水吸收,相应的化学反应方程式为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab3cd2a50774dd26e53f5841dd49ccc.png)
(2)已知:2SO2(g)+O2(g)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98feedde5546db26eb490641ba3a817.png)
2NO(g)+O2(g)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98feedde5546db26eb490641ba3a817.png)
则反应NO2(g)+SO2(g)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98feedde5546db26eb490641ba3a817.png)
a 体系压强保持不变 b 混合气体颜色保持不变
c SO3和NO的体积比保持不变 d 每消耗1 mol SO3的同时生成1 molNO2
该温度下,此反应的平衡常数表达式K=
(3)CO可用于合成甲醇,反应方程式为CO(g)+2H2(g)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98feedde5546db26eb490641ba3a817.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/1/0133a3f6-6171-4efc-a47d-583198017497.png?resizew=193)
(1)已知下列反应的热化学方程式:
① 2H2S(g)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98feedde5546db26eb490641ba3a817.png)
② CS2(g)+2H2(g)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98feedde5546db26eb490641ba3a817.png)
则反应③ CH4(g)+2H2S(g)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98feedde5546db26eb490641ba3a817.png)
(2)一定温度下的恒容体系,下列叙述能说明反应②达到平衡状态的是___________(填标号)。
A.体系压强不再变化 |
B.断裂1 mol C=S键的同时生成4 mol C-H键 |
C.混合气体的密度不再变化 |
D.2ν正(H2)=ν逆(S2) |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/22/472c1260-30eb-4a2e-bb3b-fd87762434ea.png?resizew=233)
(4)某科研小组将微电池技术用于去除废气中的H2S,其装置示意图如图二,主要反应:2Fe+2H2S+O2 = 2FeS+2H2O (FeS难溶于水),室温时,pH=7的条件下,研究反应时间对H2S的去除率的影响。
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/22/724e158c-4cdb-43fe-9529-cbe06929f359.png?resizew=214)
① 装置中微电池负极的电极反应式为
②一段时间后,电流减小,单位时间内H2S的去除率降低,可能的原因是
(1) CO2与H2催化重整制备CH3OCH3的过程中存在以下反应:
I.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18bb01d1495808579687d16aac812a05.png)
Ⅱ.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b35e90d9301361fd4631e9560221c133.png)
已知:相关物质能量变化的示意图如图所示:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/0df2a687-ff90-4921-a2ed-9706d2c9285c.png?resizew=380)
①由已知信息可知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f49cf5ec3f5756bbe6bb0c764381898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b2a6bc4b5ef80a57a78c144749392c.png)
②向密闭容器中以物质的量之比为1∶3充入CO2与H2,实验测得CO2的平衡转化率随温度和压强的变化关系如图所示。
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/a6da0f10-1e73-4dc4-aa9f-b1d4ff8aaa8c.png?resizew=253)
由图2可知,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76853a12326ed58ba1e82a22f869dca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50dfd055605586fa306c47475b4feec.png)
(2)工业上常用合成气(主要成分为CO、H2)在一定条件下制备甲醇,其涉及反应如下:
反应1:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20af31c5cb8dd4aa69097ba45f92576.png)
反应2:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b68e5cd2c8faf65e9593e8fb042ca2c.png)
反应3:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f186bd240967eaaec4b78464ddd2822.png)
向容积为2L的刚性密闭催化反应器中充入2molCO和4molH2发生上述反应,测得不同温度下,2min内CO的转化率和CH3OH的选择性(CH3OH的选择性
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0087e64fe6fbccef6169f83e9a84ceb5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/9b4330ac-ec85-48eb-9f71-7a5ee7b2ac71.jpg?resizew=264)
①若反应过程中催化剂的活性几乎不受温度影响,则T1前CO转化率升高的原因是:
②反应在T1K下,2min时达到平衡,此时体系压强为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0131d334763e752274cd9d5fc94afe00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f2fde94ce2bbcaa1a662118dd7ca92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5d73778f12dfb95b2998376824620b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/326276f15395fb6697f1502b9a1ae5e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff3dcd5e9a094a60ff298af4b5d9ec14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32321371dc4cbc0ebebaa77bd2bc496.png)
【推荐3】氨和肼(N2H4)是氮的两种常见化合物,在科学技术和生产中有广泛应用。回答下列问题:
(1)已知:N2(g)+3H2(g)2NH3(g) ΔH=-92.4kJ·mol-1
在恒温、恒容的密闭容器中,合成氨反应的各物质浓度的变化曲线如图所示。
①计算在该温度下反应2NH3(g)N2(g)+3H2(g)的平衡常数K=
②在第25min末,保持其它条件不变,若将温度降低,在第35min末再次达到平衡。在平衡移动过程中N2浓度变化了0.5mol/L,请在图中画出25-40minNH3浓度变化曲线。
③已知:2N2(g)+6H2O(l)4NH3(g)+3O2(g)△H=+1530.0kJ/mol,则氢气的热值为
(2)① N2H4是一种高能燃料具有还原性,通常用NaClO与过量NH3反应制得,请解释为什么用过量氨气反应的原因:
②用NaClO与NH3制N2H4的反应是相当复杂的,主要分为两步:
已知第一步:NH3+ClO-=OH-+NH2Cl
请写出第二步离子方程式:
③ N2H4易溶于水,是与氨相类似的弱碱,已知其常温下电离常数K1=1.0×10-6,常温下,将0.2 mol/L N2H4·H2O与0.lmol/L,盐酸等体积混合(忽略体积变化)。则此时溶液的pH等于
①2CH4(g)+O2(g)
![](https://img.xkw.com/dksih/QBM/2018/4/10/1921124478771200/1921867662245888/STEM/f518d815523249d3afa5edb98bc6df4d.png?resizew=23)
②CO(g)+2H2(g)
![](https://img.xkw.com/dksih/QBM/2018/4/10/1921124478771200/1921867662245888/STEM/893a6da90b724413999634691825031b.png?resizew=23)
③2CH4(g)+O2(g)
![](https://img.xkw.com/dksih/QBM/2018/4/10/1921124478771200/1921867662245888/STEM/893a6da90b724413999634691825031b.png?resizew=23)
(1)ΔH2=
(2)在体积可变的密闭容器中投入1 mol CO和2 mol H2,在不同条件下发生反应:CO(g)+2H2(g)
![](https://img.xkw.com/dksih/QBM/2018/4/10/1921124478771200/1921867662245888/STEM/893a6da90b724413999634691825031b.png?resizew=23)
![](https://img.xkw.com/dksih/QBM/2018/4/10/1921124478771200/1921867662245888/STEM/dcaa73bc8050448eb43e0baf5a9d9aba.png?resizew=311)
①M点时,H2的转化率为
②反应速率:N点v正(CO)
③若压强为p1、在1 L恒容密闭容器中进行上述反应(起始投料不变),在不同温度下上述反应的平衡常数的对数(lg K)如图2所示。则温度为506 K时,平衡常数K=
④在2 L恒容密闭容器中充入a(a>0) mol H2、2 mol CO和7.4 mol CH3OH(g),在506 K下进行上述反应。为了使该反应逆向进行,a的范围为
(3)某甲醇-空气燃料电池以KOH溶液为电解质溶液。当KOH全部转化成KHCO3时停止放电,写出此时负极的电极反应式
(1)在常温,1.01×105Pa时,48g 甲醇在足量的氧气中充分燃烧生成二氧化碳和液态水,放出1089kJ的热量,则表示甲醇燃烧热的热化学方程式为
(2)在生产和生活中经常遇到化学能与电能的相互转化。在如图甲、乙两装置中,甲中负极电极反应式为
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/20/b02ec4b5-b966-4efd-95a4-ea016ceae09c.png?resizew=582)
(3)肼(N2H4)可作为火箭发动机的燃料,有关肼化学反应的能量变化如图所示,已知断裂1mol化学键所需的能量(kJ):N≡N为944、O=O为500、N-N为154,则反应物转化为中间产物的ΔH3=
(4)工业制氢气的一个重要反应是:CO(g)+ H2O(g) =CO2(g) + H2(g),
已知25℃时: C(石墨)+O2(g) = CO2(g) ; △H1= -394 kJ•mol-1
C(石墨)+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cfa1e7ffae662aefb49a44c52d4954d.png)
H2(g)+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cfa1e7ffae662aefb49a44c52d4954d.png)
试计算25℃时CO(g)+H2O(g)=CO2(g)+H2(g)的反应热△H=
![](https://img.xkw.com/dksih/QBM/2018/2/5/1875664516063232/1889826844852224/STEM/076221cc585a4fc1841b92321a85a904.png?resizew=37)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5f4e9f6bd25d1c3976964906b94192.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/25/e579e44e-1bdc-480b-aca6-396d92c4a7bd.png?resizew=324)
(1)充电时:①原电池的负极与电源
②阳极的电极反应式为
(2)放电时:负极的电极反应式为
(3)某兴趣小组的同学用如图装置进行如下实验:在此过程中若完全反应,乙池中A极的质量升高648g,则甲池中理论上消耗O2的体积为
(4)已知常温时CuS的Ksp=1.3×10-36,向100 mL 2×10-18 mol·L-1的K2S溶液中加入100 mL 2×10-18 mol·L-1的CuCl2溶液,试通过计算说明有无CuS沉淀生成(写出计算推理过程,忽略溶液混合时的体积变化)