题目

同温同压下，下列各组热化学方程式中，△H1＜△H2是  A．S(g)＋O2(g)＝SO2(g)；△H1          S(s)＋O2(g)＝SO2(g)；△H2B．1/2H2(g)＋1/2Cl2(g)＝HCl(g)；△H1       H2(g)＋Cl2(g)＝2HCl(g)；△H2C．2H2(g)＋O2(g)＝2H2O(g)；△H1           2H2(g)＋O2(g)＝2H2O(l)；△H2D．C(s)＋1/2O2(g)＝CO(g)；△H1         C(s)＋O2(g)＝CO2(g)；△H2  答案：A解析: 

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