下列有机物充分燃烧时消耗氧气的量与的物质的量的乙酸充分燃烧时消耗氧气的量不同的是?A.CH4B.C2H6OC.C2H2OD.C2H4Oamp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#16

问题：下列有机物充分燃烧时消耗氧气的量与的物质的量的乙酸充分燃烧时消耗氧气的量不同的是?A.CH4B.C2H6OC.C2H2OD.C2H4Oamp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;#160;amp;

答案：↓↓↓

包津梁的回答：

网友采纳　　设有机物均是1mol,乙酸也是1mol　　烃燃烧通式CxHy+(x+y/4)O2点燃→xCO2+(y/2)H2O　　所以1molCH4消耗2molO2　　含氧有机物燃烧通式CxHyOz+(x+y/4-z/2)O2点燃→xCO2+(y/2)H2O　　所以1molC2H6O消耗3molO2　　1molC2H2O消耗2molO2　　1molC2H4O消耗2.5molO2　　1mol乙酸CH3COOH消耗2molO2　　所以选BD