Question

一氧化碳与氢气反应的热化学方程式 生成甲醇

Answer 1

CO(g)+1/2O2(g)=CO2(g) △H1=－283KJ/mol (1)

2H2(g)+O2(g)=2H2O (l) △H2=－571.6kJ/mol (2)

CH3OH(l)+3/2O2(g)=CO2(g)+2H2O(1) △H3=－725.76kJ/mol (3)

由(3)式可得:CO2(g)+2H2O(1) =CH3OH(l)+3/2O2(g)△H4=725.76kJ/mol (4)

由(1)+(2)+(4)得:

CO(g)+ 2H2(g)= CH3OH(l) △H=-128.84kJ/mol