已知H2+1/2O2=H2O(l) 焓变= -285.83KJ/mol,CO(g)+1/2O2(g)=CO2(g) 焓变

来源：学生作业帮编辑：作业帮分类：化学作业时间：2024/11/09 00:56:18

已知H2+1/2O2=H2O(l) 焓变= -285.83KJ/mol,CO(g)+1/2O2(g)=CO2(g) 焓变= -565.8KJ/mol 若氢气与一氧化碳
的混合气体完全燃烧可生成5.4gH2O(l),并放出114.03KJ热量,则混合气体中CO的物质的量为
A.0.22mol B.0.15mol C.0.1mol D.0.05mol

n(H2O)=5.4/18=0.3mol
生成0.3mol液态水放出的热量是285.83*0.3=85.749kJ
则CO燃烧放出的热量是114.03-85.749=28.281kJ
混合气体中CO的物质的量为28.281/(565.8/2)=0.1mol,选C.

已知H2+1/2O2=H2O(l) 焓变= -285.83KJ/mol,CO(g)+1/2O2(g)=CO2(g) 焓变 H2(g)+1/2O2(g)=H2O(l) 焓变= -282.8KJ/mol CO(g)+1/2O2(g)=CO2(g) 已知2H2(g)+O2(g)=2H2O(l);dertaH=—571.6kj/mol,CO(g)+1/2O2(g)=CO 已知2H2(g)+O2(g)=2H2O(1)^H=_571.6kj·mol·-1CO(g)+1/2O2(g)==CO2( 已知2H2(g)+O2=2H2O(l)△H=-571.6kJ/mol,CO(g)+1/2O2(g)=-285.8kJ/m 已知;2H2(g)+O2(g)=2H2O(l)△H=-571.6kJ•mol-1 CO(g)+1/2O2(g 已知：CH4（g）+2O2（g）=CO2(g)+2H2O（l）△H=-890.3 KJ*mol-1H2(g)+0.5O2 已知2H2（g）+O2（g）==2H2O（l） △H=-571.6KJ/mol CO(g)+1/2O2（g）==CO2（已知2H2(g)+O2(g)==2H2O(l) △H=-571.6KJ/mol CH4(g)+2O2(g)==CO2(g 已知：2H2(g)+O2(g)=2H2O(l) △H=-571.6KJ/mol CH4(g)+2O2(g)=CO2(g) 已知2H2O(L)=2H2(g)+O2(g) △H=+571.6kJ/mol CH4(g)+2O2(g)=CO2(g)+ 已知2H2(g）+O2（g）=2H2O(l)；△H=-571.6kJ/mol,C3H8(g)+5O2(g)=3CO2(g