题目内容：

在同温同压下，下列各组热化学方程式中，ΔH1>ΔH2的是

A. 2H2(g)＋O2(g)=2H2O(l)ΔH12H2(g)＋O2(g)=2H2O(g)ΔH2

B. S(g)＋O2(g)=SO2(g) ΔH1S(s)＋O2(g)=SO2(g) ΔH2

C. C(s)＋1/2O2(g)=CO(g)ΔH1C(s)＋O2(g)=CO2(g)ΔH2

D. H2(g)＋Cl2(g)=2HCl(g)ΔH11/2H2(g)＋1/2Cl2(g)=HCl(g)ΔH2