题目

25℃、101 kPa时，1 g甲醇(CH3OH)完全燃烧生成CO2和液态H2O，同时放出22.68 kJ热量。下列表示该反应的热化学方程式中正确的是( ) A . CH3OH(l)＋ O2(g)=CO2(g)＋2H2O(l) ΔH＝－725.8 kJ/mol B . 2CH3OH(l)＋3O2(g)=2CO2(g)＋4H2O(l) ΔH＝＋1 451.6 kJ/mol C . 2CH3OH＋3O2=2CO2＋4H2O(l)ΔH＝－22.68 kJ/mol D . CH3OH(l)＋ O2(g)=CO2(g)＋2H2O(g) ΔH＝－725.8 kJ/molMr.Smith is leaving for Britain tomorrow.Let’s go to seaport 　　　　 .? A.to see off him　　 B.seeing him off? C.to see him off　　 D.see him off