A.39.292kJ | B.3274.3kJ | C.784.92kJ | D.2489.44kJ |
氢气、一氧化碳、辛烷、甲烷燃烧的热化学方程式分别为: H2(g)+O2(g)=H2O(l)△H=-285.8kJ/mol CO(g)+O2(g)=CO2(g)△H=-282.6kJ/mol C8H18(l)+O2(g)=8CO2(g)+9H2O(l)△H=-5472kJ/mol CH4(g)+2O2(g)=CO2(g)+2H2O(l);△H=-889.6kJ/mol 相同质量的氢气、一氧化碳、辛烷、甲烷完全燃烧时,放出热量最少的是( ) |