单选题 较易0.85 引用2 组卷452
下列表示燃烧热的热化学方程式书写正确的是
| A．2SO2+O2=2SO3 ΔH= - 196.6 kJ·mol-1 |
| B．2H2(g)+O2(g)=2H2O(g) ΔH =-571.6 kJ·mol-1 |
| C．C(s)+O2(g)= CO2(g) ΔH = 一393.5 kJ·mol-1 |
| D．C(s)+O2(g)= CO2(g) ΔH = + 393.5 kJ·mol-1 |
22-23高二上·广东广州·期中
类题推荐
已知下列热化学方程式：
①CH3COOH(l)+2O2(g)=2CO2(g) +2H2O(l) ΔH1＝﹣870.3 kJ·mol-1
②C(s) +O2(g) =CO2(g) ΔH2＝﹣393.5 kJ·mol-1
③H2(g) +
O2(g) =H2O(l) ΔH3＝﹣285.8 kJ·mol-1
则反应2C(s) +2H2(g) +O2(g)=CH3COOH(l)的焓变ΔH为
①CH3COOH(l)+2O2(g)=2CO2(g) +2H2O(l) ΔH1＝﹣870.3 kJ·mol-1
②C(s) +O2(g) =CO2(g) ΔH2＝﹣393.5 kJ·mol-1
③H2(g) +
O2(g) =H2O(l) ΔH3＝﹣285.8 kJ·mol-1则反应2C(s) +2H2(g) +O2(g)=CH3COOH(l)的焓变ΔH为
| A．﹣488.3 kJ·mol-1 | B．﹣224.15 kJ·mol-1 |
| C．488.3 kJ·mol-1 | D．244.15 kJ·mol-1 |
已知下列反应的热化学方程式为
①CH3COOH(l)＋2O2(g)=2CO2(g)＋2H2O(l) ΔH1=-870.3 kJ·mol-1
②C(s)＋O2(g)=CO2(g) ΔH2=-393.5 kJ·mol-1
③H2(g)＋ O2(g)=H2O(l) ΔH3=-285.8 kJ·mol-1
则反应2C(s)＋2H2(g)＋O2(g)=CH3COOH(l)的ΔH为
①CH3COOH(l)＋2O2(g)=2CO2(g)＋2H2O(l) ΔH1=-870.3 kJ·mol-1
②C(s)＋O2(g)=CO2(g) ΔH2=-393.5 kJ·mol-1
③H2(g)＋
O2(g)=H2O(l) ΔH3=-285.8 kJ·mol-1则反应2C(s)＋2H2(g)＋O2(g)=CH3COOH(l)的ΔH为
| A．-207 kJ·mol-1 | B．-488.3 kJ·mol-1 |
| C．-1549.6 kJ·mol-1 | D．-476.8 kJ·mol-1 |
根据下列热化学方程式：
①C(s)+O2=CO2(g) ΔH1＝－393.5 kJ·mol－1
②H2(g)+1/2O2(g)=H2O(l) ΔH2＝－285.8 kJ·mol－1
③CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l) ΔH3＝－870.3kJ·mol－1
可计算出2C(s)+2H2(g)+O2(g)=CH3COOH(l)的反应热
①C(s)+O2=CO2(g) ΔH1＝－393.5 kJ·mol－1
②H2(g)+1/2O2(g)=H2O(l) ΔH2＝－285.8 kJ·mol－1
③CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l) ΔH3＝－870.3kJ·mol－1
可计算出2C(s)+2H2(g)+O2(g)=CH3COOH(l)的反应热
| A．ΔH＝244.1 kJ·mol－1 | B．ΔH＝－488.3 kJ·mol－1 |
| C．ΔH＝－996.6 kJ·mol－1 | D．ΔH＝996.6 kJ·mol－1 |
组卷网是一个信息分享及获取的平台，不能确保所有知识产权权属清晰，如您发现相关试题侵犯您的合法权益，请联系组卷网
