在298 K 101 kPa时,已知:2H2 (g) + O2 (g) = 2H2O(g) ΔH1;Cl2 (g) + H2 (g) =" 2HCl(g)" ΔH2;2Cl2(g) + 2H2O(g) =" 4HCl(g)" + O2 (g) ΔH3;则ΔH3与ΔH1和ΔH2间的关系正确的是
A.ΔH3 =ΔH1 + 2ΔH2 | B.ΔH3 =ΔH1 +ΔH2 |
C.ΔH3 = 2ΔH2-ΔH1 | D.ΔH3 =ΔH1-ΔH2 |
在298 K 101 kPa时,已知:2H2 (g) + O2 (g) = 2H2O(g) ΔH1;Cl2 (g) + H2 (g) =" 2HCl(g)" ΔH2;2Cl2(g) + 2H2O(g) =" 4HCl(g)" + O2 (g) ΔH3;则ΔH3与ΔH1和ΔH2间的关系正确的是
A.ΔH3 =ΔH1 + 2ΔH2 | B.ΔH3 =ΔH1 +ΔH2 |
C.ΔH3 = 2ΔH2-ΔH1 | D.ΔH3 =ΔH1-ΔH2 |
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