Chemistry: sodium bicarbonate decomposition
Self-tutoring about household chemistry: the tutor mentions a reaction.
Pretty commonly, people know that when you mix baking soda (aka sodium bicarbonate aka NaHCO3) with an acid such as lemon juice or vinegar, you get lots of bubbles because they neutralize each other. (See my post here.)
The other day I put some baking soda with water, but no acid, on a pan I wanted to clean. Then I turned the stove on under it to Low, hoping to speed up the action of the baking soda. Soon I saw bubbles, but wondered why.
It turns out that, when heated, sodium bicarbonate decomposes sodium carbonate, water, and carbon dioxide: the carbon dioxide bubbles off.
Source:
Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.