①太阳光催化分解水制氢:2H2O(l)=2H2(g)+O2(g) ΔH1= +571.6kJ·mol–1
②焦炭与水反应制氢:C(s)+H2O(g)=CO(g)+H2(g) ΔH2= +131.3kJ·mol–1
③甲烷与水反应制氢:CH4(g)+H2O(g)=CO(g)+3H2(g) ΔH3= +206.1kJ·mol–1