试题 试卷
题型:填空题 题类:常考题 难易度:普通
2015-2016学年湖南省怀化市高二上学期期末化学试卷
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( )
①CH3OH(g)+H2O(g)═CO2(g)+3H2(g)△H=+49.0kJ•mol﹣1
②CH3OH(g)+ O2(g)═CO2(g)+2H2(g)△H=﹣192.9kJ•mol﹣1
下列说法正确的是( )
①“气化”:C(s)+2H2O(g)=CO2(g)+2H2(g)ΔH1=+90.1kJ·mol-1
②催化液化I:CO2(g)+3H2(g)=CH3OH(g)+H2O(g)△H2=-49.0kJ·mol-1
③催化液化Ⅱ:CO2(g)+2H2(g)=CH3OH(g)+ O2(g)△H3=akJ·mol
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