When you combine sugar and sodium bicarbonate, it creates a rising tube of black ash. Why does it do this?

Question: When you combine sugar and sodium bicarbonate, it creates a rising tube of black ash. Why does it do this?
- Keywords:
  chemistry,
  sodium,
  sugar
Asked by to Edward, Ian, Mathew, Naomi, sakshisharda on 17 Jun 2014. This question was also asked by .
- Naomi Osborne answered on 17 Jun 2014:
  
  When you heat sodium bicarbonate and sugar it starts a reaction where sodium bicarbonate breaks down into sodium carbonate, water and carbon dioxide gas while the sugar in oxygen produces water and carbon dioxide gas. The rising tube of black ash is carbonate with black carbon particles.
- Sakshi Sharda answered on 17 Jun 2014:
  
  The black particles that you see are the same as the ones that come out of factories and vehicles. It is called soot.

Question: When you combine sugar and sodium bicarbonate, it creates a rising tube of black ash. Why does it do this?