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a<c<0 b>d>0 2a=b<0 2c=d>0
-285.8kJ/mol 285.8kJ/mol -241.8kJ/mol 241.8kJ/mol
4v(NH3)=5v(O2) 5 v(O2)=6v(H2O) 2 v(NH3)=3v(H2O) 4 v(O2)=5v(NO)
4/5v(NH3)=v(O2) 5/6 v(O2)=v(H2O) 2/3 v(NH3)=v(H2O) 4/5 v(O2)=v(NO)
B.2H6(g)+3O2(g)=B2O3(s)+3H2O(l)ΔH=+2 165 kJ·mol-1 B.2H6(g)+3O2(g)=B2O3(s)+3H2O(l)ΔH=-2 165 kJ·mol-1 B.2H6+3O2=B2O3+3H2OΔH=-2 165 kJ·mol-1 B.2H6(g)+O2(g)=B2O3(s)+H2O(g)ΔH=-2 165 kJ·mol-1
NaCl、HCl、H2O、NaOH Cl2、Na2S、HCl、SO2 HBr、CO2、H2O、CS2 Na2O2、H2O2、H2O、O3
H+H2O→H3O+ O3(s)→O(s)+O2(g) H2O(s)→H2O(l) H4(g)+2O2(g)→O2(g)+2H2O(l)
C.+ H2O == CO + H2 ∆H= +131.3 kJ mol H -1 C(s)+ H2O(g) == CO(g) + H2(g) ∆H= +10.94 kJ·mol -1 C(s)+ H2O(l) == CO(g) + H2(g) ∆H= +131.3 kJ· mol -1 C(s)+ H2O(g) == CO(g) + H2(g)∆H= +131.3 kJ· mol -1
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
2H2(g)+O2(g)==2H2O(l) △H<0 HCl(aq)+NaOH(aq)==NaCl(aq)+H2O(l) △H<0 2Al(s)+3Cl2(g)==2AlCl3(s) △H<0 Zn(s)+2HCl(aq)==ZnCl2+H2(g) △H<0
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
4v(NH3)=5v(O2) 5 v(O2)=6v(H2O) 2 v(NH3)=3v(H2O) 4 v(O2)=5v(NO)