已知:(1)Zn(s)+12O2(g)=ZnO(s)△H=-348.3kJ•mol-1
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:化学作业 时间:2024/06/23 08:30:46
已知:(1)Zn(s)+
1 |
2 |
![已知:(1)Zn(s)+12O2(g)=ZnO(s)△H=-348.3kJ•mol-1](/uploads/image/z/19656679-31-9.jpg?t=%E5%B7%B2%E7%9F%A5%EF%BC%9A%EF%BC%881%EF%BC%89Zn%EF%BC%88s%EF%BC%89%2B12O2%EF%BC%88g%EF%BC%89%3DZnO%EF%BC%88s%EF%BC%89%E2%96%B3H%3D-348.3kJ%E2%80%A2mol-1)
(1)Zn(s)+
1
2O2(g)=ZnO(s)△H=-348.3kJ•mol-1
(2)4Ag(s)+O2(g)=2Ag2O(s)△H=-62.0kJ•mol-1
依据盖斯定律(1)×2-(2)得到2Zn(s)+2Ag2 O(s)=2Zn O(s)+4Ag(s)△H=-634.6KJ/mol
则Zn(s)+Ag2 O(s)=Zn O(s)+2Ag(s)△H=-317.3kJ•mol-1;
故答案为:-317.3kJ•mol-1;
故选B.
1
2O2(g)=ZnO(s)△H=-348.3kJ•mol-1
(2)4Ag(s)+O2(g)=2Ag2O(s)△H=-62.0kJ•mol-1
依据盖斯定律(1)×2-(2)得到2Zn(s)+2Ag2 O(s)=2Zn O(s)+4Ag(s)△H=-634.6KJ/mol
则Zn(s)+Ag2 O(s)=Zn O(s)+2Ag(s)△H=-317.3kJ•mol-1;
故答案为:-317.3kJ•mol-1;
故选B.
已知 (1) 标况下 2C(s)+O2(g)==2CO2(g) △H=-221KJ/mol
1.c(s)+o2(g)=co2(g);△H=-393.5kj/mol
已知①2C(s)+O2(g)==2CO(g) △H=-221.0KJ/mol
根据热化学方程式:S(l)+O2(g)═SO2(g)△H=-293.23kJ•mol-1,分析下列说法正确的是( )
①已知25摄氏度101kPa时,2C(s)+O2(g)=2CO(g);△H=—221kj、mol
已知:C(s)+1/2O2(g)=CO(s)▲H=-110.35kj/mol C(s)+O2(g)=CO2(g)▲H=-
已知:CH4(g)+2O2(g)=CO2(g)+2H2O(l)△H=-890.3 KJ*mol-1H2(g)+0.5O2
已知下列热化学方程式:①H2(g)+12O2(g)=H2O(l)△H=-285.8kJ•mol-1
已知:C(s)+O2(g)=CO2(g);ΔH=-393.5KJ/mol.H2(g)+
已知:2H2(g)+O2(g)═2H2O(g)△H=-483.6kJ•mol-1 H2(g)+12O2(g)═H2O(l
已知氢气的燃烧热为285.8KJ/ mol,H2(g)=H2(l),△H=-0.9KJ/mol;O2(g)=O2(l),
Zn(s)+CuSO4(aq)=ZnSO4+(aq)+Cu(s)△H=-216+kJ•mol-1,CuSO4