2NaHCO3 => (Heat) => CO2 + Na2CO3 + H20
Sodium Carbonate => CarbonDioxide + Sodium Carbonate + Vapor
Ref:
http://www.saskschools.ca/curr_content/paasurvey/foods10/mod3/lo3.3/leaveningagents.htm
No, yeast and baking powder are not the same ingredient used in baking. Yeast is a living organism that produces carbon dioxide gas to help dough rise, while baking powder is a chemical leavening agent that also helps dough rise but does not require time to ferment.
Batters and dough made with baking powder are ready to cook as soon as the ingredients are combined. Baking powder dough does not require time to rise as yeast dough does.
No, yeast and baking powder are not interchangeable in recipes. Yeast is a living organism that requires time to ferment and leaven dough, while baking powder is a chemical leavening agent that works instantly.
Baking powder allows the dough to rise, and is often used with salt.
Cookie dough recipes generally call for either baking soda or baking powder, which create gas that expands and causes the dough to rise while baking.
Baking Powder.
Baking powder reduces density. The action of the baking powder produces gas that causes the product to rise, making the dough or batter less dense.
The reaction of baking powder to release carbon dioxide bubbles is a chemical change because it involves the formation of new substances (carbon dioxide gas) due to a chemical reaction. The carbon dioxide bubbles cause the dough to rise through physical expansion, but the underlying process of gas production is a chemical change.
Baking powder and baking soda do not taste like salt; they are both primarily used as leavening agents in baking to help dough rise. Baking soda has a slightly salty and alkaline taste, while baking powder is neutral in flavor.
Baking powder is a white, powdery substance that is commonly used in baking to help dough rise. It is usually found in the baking aisle of grocery stores, typically in small cans or containers labeled as "baking powder." Look for a white powder in a small container with the words "baking powder" on the label to identify it in the store.
If baking powder is called for in a recipe, it is essential. The base and acid components in the powder, when wet, create the air bubbles that cause the dough to rise, making the end product soft and allowing it to cook thoroughly. Without the baking powder or baking soda (see below), the result of baking unleavened dough will be just hot dough or perhaps dough dried hard. If you have no baking powder but have baking soda, you can substitute a combination of baking soda plus an acidic ingredient, such as molasses, buttermilk or yogurt, or even a little citrus juice.
Only substitute baking soda for baking powder if the cookie dough will be baked within 30 minutes of mixing. Baking soda begins to lose potency as soon as it gets wet so baking powder is used when the dough will be allowed to sit for a long time before baking.