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反应N2(g)+3H2(g) 2NH3(g) △H

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N2(g)+3H2(g)2NH3(l) ΔH.=2(a-b-c) kJ·mol-1   N2(g)+3H2(g)2NH3(g) ΔH.=2(b-a) kJ·mol-1   1/2N2(g)+3/2H2(g)NH3(l) ΔH.=(b+c-a) kJ·mol-1   1/2N2(g)+3/2H2(g)NH3(g) ΔH.=(a+b) kJ·mol-1  
N2(g)+3H2(g) = 2NH3(g) ;△H.= 2(b—a) kJ/mol   N2(g)+3H2(g) = 2NH3(l);△H.= 2(a—b—c) kJ/mol   N2(g)+H2(g) = NH3(l) ;△H.= (b+c—a) kJ/mol   N2(g)+H2(g) =NH3(g) ;△H.= (a+b) kJ/mol  
-726.5 KJ/mol   -1087.5KJ/mol   -1268 KJ/mol   +1994.5 KJ/mol  
对于反应3Fe(s)+4H2O(g)⇌Fe3O4(s)+4H2(g),增加Fe的量   对于N2(g)+3H2(g)⇌2NH3(g),容器体积固定不变时,充入Ar   对于N2(g)+3H2(g)⇌2NH3(g),容器体积固定不变时,充入N2   对于N2(g)+3H2(g)⇌2NH3(g),容器气体压强不变时,充入Ar  
N2(g)+3H2(g)2NH3(l) ΔH.=-2(b+c - a)kJ/mol   N2(g)+3H2(g)2NH3(g) ΔH. =-2(a - b)kJ/mol   N2(g)+3H2(g) 2NH3(l) ΔH.=+(b+c - a)kJ/mol   N2(g)+3H2(g) 2NH3(g) ΔH.=+(a+b)kJ/mol  
己知C (石墨,s) =C (金刚石,s) △H>0,说明金刚石比石墨稳定   己知 H+ (aq) +OH- (aq) =H2O(1) △H= - 57. 4kJ/mol,则含20.0gNaOH的稀溶液与稀醋酸完全中和,放出热量小于28. 7kJ   己知甲烷的燃烧热为890. 3kJ/mol,则表示甲烷燃烧热的热化学方柷式可表示为: CH4 (g) +2O2 (g) =CO2 (g) +2H2O(g) △H=- 890. 3kJ/mol   将0.5molN2和1.5molH2置于密闭容器中充分反应生成NH3(g),放热19.3kJ,其热化学方程式为:N2 (g) +3H2 (g)2NH3g) △H =-38.6kJ/mol  
N2(g)+3H2(g) = 2NH3(l);⊿H = 2(a—b—c)kJ·mol-1   N2(g)+3H2(g) = 2NH3(g) ;⊿H = 2(b—a)kJ·mol-1   N2(g)+H2(g) = NH3(l) ;⊿H = (b+c—a)kJ·mol-1   N2(g)+H2(g) =NH3(g) ;⊿H = (a+b)kJ·mol-1  
N2(g)+H2((g)=NH3(g);ΔH.=(a+b) kJ·mol1   N2(g)+3H2(g)=2NH3(g);ΔH.=2(b-a) kJ·mol1   N2(g)+H2(g)=NH3(l);ΔH.=(b+c-a) kJ·mol1   N2(g)+3H2(g)=2NH3(l);ΔH.=2(a-b-c) kJ·mol1  
N2(g)+3H2(g) 2NH3(1);△H=2(a-b-c)kJ·mol-1    N2(g)+3H2(g) 2NH3(g);△H=2(b-a)kJ·mol-1   N2(g)+H2(g) NH3(1);△H=(b+c-a)kJ·mol-1   N2(g)+H2(g) NH3(g);△H=(a+b)kJ·mol-1  
N2(g)+3H2(g) 2NH3(l) ⊿H = 2(a—b—c)kJ/mol   N2(g)+3H2(g) 2NH3(g) ⊿H = 2(b—a)kJ/mol   0.5N2(g)+1.5H2(g) NH3(l) ⊿H = (b+c—a)kJ/mol   0.5N2(g)+1.5H2(g) NH3(g) ⊿H = (a+b)kJ/mol  
N2(g)+3H2(g)⇌2NH3(l)△H.=2(a﹣b﹣c)kJ/mol   N2(g)+3H2(g)⇌2NH3(g)△H.=2(b﹣a)kJ/mol   0.5N2(g)+1.5H2(g)⇌NH3(l)△H.=(b+c﹣a)kJ/mol   0.5N2(g)+1.5H2(g)⇌NH3(g)△H.=(a+b)kJ/mol  
N2(g)+3H2(g) = 2NH3(l);⊿H.= 2(a—b—c)kJ/mol   N2(g)+3H2(g) = 2NH3(g) ;⊿H.= 2(b—a)kJ/mol   N2(g)+H2(g) = NH3(l) ;⊿H.= (b+c—a)kJ/mol   N2(g)+H2(g) =NH3(g) ;⊿H.= (a+b)kJ/mol  
N2(g)+3H2(g) 2NH3(l) ⊿H = 2(a—b—c)kJ/mol   N2(g)+3H2(g) 2NH3(g) ⊿H = 2(b—a)kJ/mol   0.5N2(g)+1.5H2(g) NH3(l) ⊿H = (b+c—a)kJ/mol   0.5N2(g)+1.5H2(g) NH3(g) ⊿H = (a+b)kJ/mol   
N2(g)+3H2(g) = 2NH3(l); ⊿H = 2(a—b—c)kJ·mol-1   N2(g)+3H2(g) = 2NH3(g) ; ⊿H = 2(b—a)kJ·mol-1   N2(g)+H2(g) = NH3(l) ; ⊿H = (b+c—a)kJ·mol-1   N2(g)+H2 (g) =NH3(g) ; ⊿H = (a+b)kJ·mol-1  
N2(g)+3H2(g) = 2NH3(l);⊿H = 2(a—b—c)kJ·mol-1   N2(g)+3H2(g) = 2NH3(g) ;⊿H = 2(b—a)kJ·mol-1   N2(g)+H2(g) = NH3(l) ;⊿H = (b+c—a)kJ·mol-1   N2(g)+H2(g) =NH3(g) ;⊿H = (a+b)kJ·mol-1  
N2(g)+3H2(g)⇌2NH3(l)△H=2(a﹣b﹣c)kJ/mol   N2(g)+3H2(g)⇌2NH3(g)△H=2(b﹣a)kJ/mol   0.5N2(g)+1.5H2(g)⇌NH3(l)△H=(b+c﹣a)kJ/mol   0.5N2(g)+1.5H2(g)⇌NH3(g)△H=(a+b)kJ/mol   
N2(g)+3H2(g) 2NH3(l) ΔH=2(a-b-c) kJ·mol-1  N2(g)+3H2(g) 2NH3(g) ΔH=2(b-a) kJ·mol-1   N2(g)+H2(g) NH3(l) ΔH=(b+c-a) kJ·mol-1   N2(g)+H2(g) NH3(g) ΔH=(a+b) kJ·mol-1  
2ΔH1 + 2ΔH2 - 2ΔH3    ΔH1 + ΔH2 - ΔH3    3ΔH1 + 2ΔH2 + 2ΔH3    3ΔH1 + 2ΔH2 - 2ΔH3  

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