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a<c<0 b>d>0 2a=b<0 2c=d>0
438.6 kJ/mol 241.8 kJ/mol 285.8 kJ/mol 无法确定
放出的热量为(0.4Q1+0.1Q3)KJ 放出的热量为(0.4Q1+0.05Q2)KJ 放出的热量为(0.4Q1+0.05Q3)KJ △H2 <△H3
241.8 kJ/mol 483.6 kJ/mol 285.8 kJ/mol 571.6 kJ/mol
2.43 kJ 4.86 kJ 43.8 kJ 87.5 kJ
H2(g)+Cl2(g)=2HCl(g);△H=-a 1/2H2(g)+1/2Cl2(g)=HCl(g);△H=-b C(s)+1/2O2(g)=CO (g);△H=-a (s)+O2(g)=CO2 (g);△H=-b C. 2H2(g)+O2(g)=2H2O(l);△H=-a 2H2(g)+O2(g)=2H2O(g);△H=-b S(g)+O2(g)=SO2 (g);△H=-a S(s)+O2(g)=SO2 (g);△H=-b
放出的热量为(0.4Q1+0.05Q3)KJ/mol 放出的热量为(0.4Q1+0.05Q2)KJ/mol △H2 > △H3 △H2 <△H3
2H2(g)+O2(g)==2H2O(g) △H.1 2H2(g)+O2(g)==2H2O(l) △H.2 S(g)+O2(g)==SO2(g) △H.1 S(s)+O2(g)==SO2(g) △H.2 C.(s)+ O2(g)==CO(g) △H.1C.(s)+ O2(g)==CO2(g) △H.2 H2(g)+ Cl2(g)==2HCl(g) △H.1 H2(g)+ Cl2(g)==HCl(g) △H.2
S(s) + O2 (g) =SO2 (g); △H1 S(g) + O2 (g) =SO2 (g);△H2 2H2(g) + O2 (g)= 2H2O(g);△H1 2H2 (g) + O2 (g) = 2H2O(l);△H2 CO(g) + 1/2 O2(g) = CO2(g);△H1 2CO(g) + O2(g) = 2CO2(g);△H2 H2 (g) +Cl2(g)=2HCl(g);△H1 1/2 H2(g) + 1/2 Cl2(g) = HCl(g);△H2
2H2(g) + O2(g)= 2H2O(g) △H1 ; 2H2(g) + O2(g) = 2H2O(l) △H2 S(g) + O2(g) =SO2(g) △H1 ; S(s) + O2(g) = SO2(g) △H2 CO(g) + 1/2 O2(g) = CO2(g) △H1 ;2CO(g) + O2(g) = 2CO2(g) △H2 C.(s)+H2O(g)=CO(g)+H2(g) △H1 ;CaO(s)+H2O(l)===Ca(OH)2(s) △H2
2Q1>O2 Q1>2Q2 2Q1<Q2 Q2=Q1
S(s)+O2(g) → SO2(g) ΔH1 S(g)+O2(g) → SO2(g) ΔH 2 2H2(g)+O2(g) → 2H2O(l) ΔH 1 2H2(g)+O2(g) → 2H2O(g) ΔH 2 NaOH(aq)+HCl(aq) → NaCl(aq)+H2O(l) ΔH 1
NaOH(aq)+CH3COOH(aq) →CH3COONa(aq)+H2O(l) ΔH 2
H2(g)+F.2(g) → 2HF(g) ΔH 1 H2(g)+Cl2(g) → 2HCl(g) ΔH 2
H2O(g)=H2(g)+ 1/2O2 (g)△H=+242 kJ.mol-1 2H2(g)+O2(g)=2H2O(l) △H= -484 kJ.mol-l H2(g)+ 1/2O2(g)=H2O(g) △H=+242 kJ.mol-l 2H2(g) + O2(g) = 2 H2O(g) △H= -484 kJ