已知热化学方程式：①C2H2(g)+O2(g)==2CO2(g)＋H2O(l) ΔH1＝-1301.0kJ•m...
问题详情：已知热化学方程式：①C2H2(g)+O2(g)==2CO2(g)＋H2O(l) ΔH1＝-1301.0kJ•mol-1②C(s)+O2(g)==CO2(g) △H2＝-393.5kJ•mol-1③H2(g)+O2(g)==H2O(1) △H3=-285.8kJ·mol-1则反应④2C(s)+H2(g)==C2H2(g)的△H为（ ...
问题详情：已知热化学方程式：①C2H2(g)+O2(g)==2CO2(g)＋H2O(l) ΔH1＝-1301.0kJ•mol-1②C(s)+O2(g)==CO2(g) △H2＝-393.5kJ•mol-1③H2(g)+O2(g)==H2O(1) △H3=-285.8kJ·mol-1则反应④2C(s)+H2(g)==C2H2(g)的△H为（ ...