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發表於:2021-08-31
問題詳情:在2000K時,反應CO(g)+1/2O2(g) CO2(g)的平衡常數為K1,則相同溫度下反應2CO2(g) 2CO(g)+O2(g)的平衡常數K2為A.1/K12 B.K12 C.1/K1 D.K1-1/2【回答】A知識點:化學平衡單元...
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發表於:2020-07-02
問題詳情:已知熱化學方程式:①CO(g)+1/2O2(g)=CO2(g)ΔH=-283.0kJ·mol-1②H2(g)+1/2O2(g)=H2O(g)ΔH=-241.8kJ·mol-1則下列說法正確的是 A.H2的燃燒熱為241.8kJ·mol-1B.由反應①、②可知上圖所示的熱...
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發表於:2019-12-29
問題詳情:以下幾個熱化學方程式,能表示有關物質燃燒時的燃燒熱的熱化學方程式是A.C(s)+1/2O2(g)═CO(g)△H=+110.5kJ?mol﹣1B.C(s)+O2(g)═CO2(g)△H=﹣393.5kJ?mol﹣1C.2H2(g)+O2(g)═2H2O(l)△H=﹣571.6kJ?mol﹣1D....
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發表於:2021-04-11
問題詳情:已知:(1)Zn(s)+1/2O2(g)==ZnO(s),ΔH=-348.3kJ/mol (2)2Ag(s)+1/2O2(g)==Ag2O(s),ΔH=-31.0kJ/mol則Zn(s)+Ag2O(s)==ZnO(s)+2Ag(s)的ΔH等於( )A.-317.3kJ/mol B...
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發表於:2020-03-16
問題詳情:已知下列熱化學方程式:①H2(g)+1/2O2(g)=H2O(l)ΔH=-285kJ·mol-1②H2(g)+1/2O2(g)=H2O(g)ΔH=-241.8kJ·mol-1 ③C(s)+1/2O2(g)=CO(g)ΔH=-110.5kJ·mol-1④C(s)+O2(g)=CO2(g)ΔH=-393.5kJ·mol-1...
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發表於:2020-12-24
問題詳情:已知下列熱化學方程式:Zn(S)+1/2O2(g)=ZnO(S)△H1;Hg(l)+1/2 O2(g)=HgO(S)△H2;則Zn(S)+HgO(S)=Hg(l)+ZnO(S)△H值為( )A、△H2-△H1 B、△H...
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發表於:2020-03-05
問題詳情:.已知下列熱化學方程式:①H2(g)+1/2O2(g)=H2O(l)ΔH=-285kJ·mol-1,②H2(g)+1/2O2(g)=H2O(g)ΔH=-241.8kJ·mol-1,③C(s)+1/2O2(g)=CO(g)ΔH=-110.5kJ·mol-1,④C(s)+O2(g)=CO2(g)ΔH=-393.5kJ·mol-1,回答下列...
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發表於:2022-08-08
問題詳情:已知:(1)H2(g)+1/2O2(g)====H2O(g) ΔH1=akJ·mol-1(2)2H2(g)+O2(g)====2H2O(g) ΔH2=bkJ·mol-1(3)H2(g)+1/2O2(g)====H2O(l) ΔH3=ckJ·mol-1(4)2H2(g)+O2(g)====2H2O(l) ΔH4=dkJ·mol-1下列關係式正確的...
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發表於:2022-08-10
問題詳情:下列各組熱化學方程式中,△H前者大於後者的是①C(s)+O2(g)=CO2(g); C(s)+1/2O2(g)=CO(g) ②S(s)+O2(g)=SO2(g); S(g)+O2(g)=SO2(g)③H2(s)+1/2O2(g)=H2O(l); 2H2(g)+O2(g)=2H2...
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發表於:2022-08-13
問題詳情:今有如下三個熱化學方程式:H2(g)+1/2O2(g)=H2O(g);ΔH=aKJ·mol-1,H2(g)+1/2O2(g)=H2O(l);ΔH==bkJ·mol-1,2H2(g)+O2(g)=2H2O(l);ΔH==ckJ·mol-1,關於它們的下列表述正確的是A.它們都是吸熱反應 ...
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發表於:2021-08-29
問題詳情:今有如下三個熱化學方程式: H2(g)+1/2O2(g)=H2O(g);ΔH=aKJ·mol-1,H2(g)+1/2O2(g)=H2O(l);ΔH== bkJ·mol-1,2H2(g)+O2(g)=2H2O(l);ΔH== ckJ·mol-1,關於它們的下列表述正確的是( )A.它們都是吸...
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發表於:2021-07-31
問題詳情:有3個熱化學方程式:H2(g)+1/2O2(g)=H2O(g)△H=akJ/molH2(g)+1/2O2(g)=H2O(l)△H=bkJ/mol2H2(g)+O2(g)=2H2O(l)△H=ckJ/mol關於它們的下列表述正確的是( )A.a+b=c B.1molH2O由氣態變為...
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發表於:2021-10-30
問題詳情:已知⑴H2(g)+1/2O2(g)=H2O(g); △H1=a kJ/mol⑵2H2(g)+O2(g)=2H2O(g); △H2=b kJ/mol⑶H2(g)+1/2O2(g)=H2O(l); △H3=c kJ/mol⑷2H2(g)+O2(g)=2H2O(l); △H4=d kJ/mol下列關係式中正確...
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發表於:2019-04-16
問題詳情:已知下列熱化學方程式:Zn(s)+1/2O2(g)=ZnO(s)ΔH=-351.1kJ·mol-1①Hg(l)+1/2O2(g)=HgO(s)ΔH=-90.7kJ·mol-1②由此可知Zn(s)+HgO(s)=ZnO(s)+Hg(l)的反應熱ΔH為A.-260.4kJ·mol-1 B.+260.4kJ·mo...
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發表於:2021-10-24
問題詳情:5℃、101kPa下:①2Na(s)+1/2O2(g)=Na2O(s)△H1=-414k/mol②2Na(s)+O2(g)=Na2O2(s)△H2=-511kJ/mol下列說法正確的是 ( ) A.①和②生成等物質的量的產物,轉移的電子數相同 B.N...