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Yeast makes bread rise, due to a chemical reaction because of exposure to heat

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The gas bubbles that cause bread to rise are carbon dioxide made in which process?

Alcoholic fermentation. Bread dough which has risen contains (a very small amount of) ethanol in addition to the carbon dioxide which is what actually makes it "rise". Most of the ethanol cooks out during the baking process.


What product produced by yeats cells during fermentation causes bread to rise?

Carbon dioxide is the gas produced by yeast cells during fermentation that causes bread dough to rise through the process of leavening. This gas gets trapped in the dough, creating air pockets that expand and make the bread rise.


Why do bakers use yeast to bake bread?

Yeast is a living, microscopic, single-cell organism that, as it grows, converts its food (through a process known as fermentation) carbon dioxide. This trait is what endears yeast to bread bakers. The art of bread making needs the carbon dioxide produced by yeast in order for certain doughs to rise. To multiply and grow, all yeast needs is the right environment, which includes moisture, food (in the form of sugar or starch) and a warm, nurturing temperature (70° to 85°F is best).The breakdown of the yeast causes effervescence, the giving off of gasses which get trapped in the dough, and the lump of dough expands. As the bread is usually in a tin, the only way it can expand is upwards. A lump of dough not in a tin will expand sideways as well as upwards.Yeast holds a chemical [not dangerous to mankind] and when heated it rises just like smoke when cooked by its self it can catch fire at just 35 degrees.Yeast is a living organism. It feeds off the sugar in the bread and respires, meaning that it takes in oxygen and gives out carbon dioxide. The carbon dioxide given out is the 'air' inside bread.


What waste product of yeast respiration is useful in making bread?

Carbon dioxide is the waste product of yeast respiration that is useful in making bread. The carbon dioxide gas produced causes the bread dough to rise, resulting in a lighter and fluffier texture.


How is oxygen added to bread dough?

Oxygen is added to bread dough through the process of kneading. When dough is kneaded, the gluten in the flour is formed into a network that traps air bubbles. These air bubbles help the dough rise during fermentation, leading to a light and airy bread texture.