已知反应:①H2(g)+ O2(g)=H2O(g) ΔH1
② N2(g)+O2(g)=NO2(g) ΔH2
③ N2(g)+ H2(g)=NH3(g) ΔH3
则反应2NH3(g)+O2(g)=2NO2(g)+3H2O(g)的ΔH为
A.2ΔH1+2ΔH2-2ΔH3 | B.ΔH1+ΔH2-ΔH3 |
C.3ΔH1+2ΔH2+2ΔH3 | D.3ΔH1+2ΔH2-2ΔH3 |
已知反应:①H2(g)+ O2(g)=H2O(g) ΔH1
② N2(g)+O2(g)=NO2(g) ΔH2
③ N2(g)+ H2(g)=NH3(g) ΔH3
则反应2NH3(g)+O2(g)=2NO2(g)+3H2O(g)的ΔH为
A.2ΔH1+2ΔH2-2ΔH3 | B.ΔH1+ΔH2-ΔH3 |
C.3ΔH1+2ΔH2+2ΔH3 | D.3ΔH1+2ΔH2-2ΔH3 |