你可能感兴趣的试题
a<c<0 b>d>0 2a=b<0 2c=d>0
-285.8kJ/mol 285.8kJ/mol -241.8kJ/mol 241.8kJ/mol
438.6 kJ/mol 241.8 kJ/mol 285.8 kJ/mol 无法确定
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
2C2H2(g)+5O2(g)===4CO2(g)+2H2O(g) C.2H2(g)+O2(g)===2CO2(g)+H2O(l) C.2H2(g)+O2(g)===2CO(g)+H2O(g) C.2H2(g)+O2(g)===2CO(g)+H2O(l)
H2O(g)=H2(g)+1/2 O2(g) ΔH=+242 kJ/mol 2 H2(g)+O2(g)=2 H2O(g) ΔH=-484 kJ/mol H2(g)+1/2 O2(g)=H2O(g) ΔH=+242 kJ/mol 2 H2(g)+O2(g)=2 H2O(g) ΔH=+484 kJ/mol
4/5v(NH3)=v(O2) 5/6 v(O2)=v(H2O) 2/3 v(NH3)=v(H2O) 4/5 v(O2)=v(NO)
H2(g) CO(g) C.8H18(l) CH4(g)
H+H2O→H3O+ O3(s)→O(s)+O2(g) H2O(s)→H2O(l) H4(g)+2O2(g)→O2(g)+2H2O(l)
4a+4b+4c 2a-2b+6c 2a-2b+2c 2a-6b+2c
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