H12HClgCl的精選

問題詳情：在298K、100kPa時，已知：2H2O(g)===O2(g)＋2H2(g)ΔH12HCl(g)===Cl2(g)＋H2(g)ΔH22Cl2(g)＋2H2O(g)===4HCl(g)＋O2(g)ΔH3則ΔH3與ΔH1和ΔH2間的關係正確的是()A．ΔH3＝ΔH1＋2ΔH2   B．ΔH3＝ΔH1＋ΔH2 C．ΔH3＝ΔH1－ΔH2  D...