H1Cl2g的精选

问题详情： 在298K、100kPa时，已知：2H2O(g)===O2(g)＋2H2(g)ΔH1Cl2(g)＋H2(g)="==2HCl(g)"ΔH22Cl2(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                ...

问题详情：在298K、100kPa时，已知：2H2O(g)===O2(g)＋2H2(g)ΔH1Cl2(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－ΔH2     B．ΔH3＝ΔH1＋ΔH2C．ΔH3...