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题型:多选题 题类:常考题 难易度:普通
(1)H2( g )+O2 ( g )=H2O ( g )△H1=a kJ/mol
(2)2H2( g )+O2 ( g )=2H2O ( g )△H2=b kJ/mol
(3)H2( g )+O2 ( g )=H2O ( l )△H3=c kJ/mol
(4)2H2( g )+O2 ( g )=2H2O ( l )△H4=d kJ/mol
则a、b、c、d的关系正确的是( )
已知合成氨的反应为:N2(g)+3H2(g)2NH3(g);△H=-QkJ·mo(Q>0)。在同温同压下向密闭容器甲中通入1molN2和3molH2 , 达平衡时,放出的热量为QlkJ;向另一容积相同的密闭容器乙中通入0.5molN2和1.5 molH2 , 反应达平衡时,放出的热量为Q2kJ。则下列关系式正确的是( )
①C2H4(g)⇌C2H2(g)+H2(g),
②2CH4(g)⇌C2H4(g)+2H2(g).当升高温度时,①和②式皆向右移动.
(1)C(s)+2H2(g)⇌CH4(g)△H1
(2)2C(s)+H2(g)⇌C2H2(g)△H2
(3)2C(s)+2H2(g)⇌C2H4(g)△H3
下列有关(1)、(2)和(3)中的△H1、△H2、△H3大小顺序排列正确的是( )
①CH4(g)+2O2(g)═CO2(g)+2H2O(g)△H1CH4(g)+2O2(g)═CO2(g)+2H2O(l)△H2
②NaOH(aq)+ H2SO4(浓)═ Na2SO4(aq)+H2O(l)△H3
NaOH(aq)+CH3COOH(aq)═CH3COONa(aq)+H2O(l)△H4 .
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