氢气,一氧化碳,辛烷,甲烷的化学方程式分别为:H2(g)+(1/2)O2(g)=H2O(l); △H=-285.8kJ/molCO(g)+(1/2)O2(g)=CO2(g) ; △H=-283.0kJ/molC8H18(l)+(25/2)O2(g)=8CO2(g)+9H2O(l);△H=-5518kJ/molCH4(g)+(2)O2(g)=CO2(g)+2H2O(l); △H=-893kJ/mol 相

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