问题描述:
已知下列数据:2Fe(s)+O2(g)=2FeO(s)△H=-544kJ•mol-1
4Al(s)+3O2(g)=2Al2O3(s)△H=-3350kJ•mol-1
则2Al(s)+3FeO(s)=Al2O3(s)+3Fe(s)的△H是( )
A.-859 kJ•mol-1
B.+859 kJ•mol-1
C.-1403 kJ•mol-1
D.-2491 kJ•mol-1
最佳答案:
已知:①2Fe(s)+O2(g)=2FeO(s)△H=-544kJ•mol-1②4Al(s)+3O2(g)=2Al2O3(s)△H=-3350kJ•mol-1据盖斯定律可得,②×12-①×32得:2Al(s)+3FeO(s)=Al2O3(s)+3Fe(s)△H=(-3350kJ•mol-1)×12-(...