分解碳水化合物

用最簡單carbonhydrate---glucose為例 :
C6H12O6 + O2 ---------->CO2 + H2O +CO + C limit supply of oxygen
" + 5O2---------> 2CO2 + 12 H2O + 6CO + 4C lots of oxygen .
以上燃燒因有氧供應不同 , 會產生不同分量 . 而碳存在＝氣及一固內 . 而將水氣及＝氣引到冰糟 , 就可得到液態水了 . 這樣就可得到水份量 . 而以上就不能measure碳 , 除非能將CO2及CO還原 .
可以將glucose放入濃H2SO4內 , 它能extracted molecular H & O to form water to dilute itself !
C6H12O6 + H2SO4-----> 6C + H2SO4.12H2O(dilute acid)

I am afraid you have not made things clear when you asked.

Heating is different from burning.
If we burn the carbohydrate in the presence of oxygen, it will react with oxygen to give carbon dixoide and water.

If you heat the carbohydrate, you will melt it. I think it is very difficult to get carbon by heating it, although it is possible.

One way to dehydrate carbohydrate is by adding concentrated sulfuric acid, which would "extract" -H and -OH (i.e. water) from the carbohydrate, leaving "C" behind.

You must understand we are talking about chemical reactions, but not merely heating or evapourating water away.

碳水化合物存有大量化學能,燃燒時會釋放能量,水,二氧化碳,剩下的是碳,若要把碳水化合物還原水可以進行密封燃燒,收集碳水化合物燃燒時所釋放出的水蒸氣。

2012-08-28 21:30:22 補充：
密封燃燒需要注入足夠的氧氣