问题描述:
已知:(1)2Fe(s)+O2(g)=2FeO(s)△H=-544kJ•mol-1
(2)2Al(s)+
3 |
2 |
则 2Al(s)+3FeO(s)=Al2O3(s)+3Fe(s)的△H为( )
A.-2491 kJ•mol-1
B.+859 kJ•mol-1
C.-1403 kJ•mol-1
D.-859 kJ•mol-1
最佳答案:
已知:(1)2Fe(s)+O2(g)=2FeO(s)△H=-544kJ•mol-1
(2)2Al(s)+
3 |
2 |
据盖斯定律,(2)-(1)×
3 |
2 |
故选:D