why is digestion of food a chemical change?
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Digestion of a food is considered as a chemical change as various chemical reactions take place while digestion of food. Moreover, as chemical changes are irreversible change so it is known as chemical change.
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Chemical digestion is considered achemical change because enzymes in the stomach and intestines break down large macromolecules into simpler molecules so that the body can more easily absorb the food.
First, there are two types of digestion: mechanical and chemical.
Mechanical digestion does notresult in a chemical change, e.g. chewing**Chemical digestion results in a chemical change, e.g. digestion in the intestines.
Chemical digestion is considered a chemical change because enzymes in the stomach and intestines break down large macromolecules into simpler molecules so that the body can more easily absorb the food.
For example, an enzyme in the small intestine called lactase breaks down lactose, [math]C_{12} H_{22} O_{11}[/math], into two isomers of [math]C_{6} H_{12} O_{6}[/math], namely glucose and galactose. The reaction is: [math]C_{12} H_{22} O_{11}+H_2 O \to C_6 H_{12} O_6+C_6 H_{12} O_6+[/math]heat.
Therefore, enzymes, which are bio-catalysts, are what cause digestion to occur, and that’s why digestion is a chemical change.
**one may say that chewing is also chemical because we have an enzyme in our saliva, salivary amylase, which breaks starch into sugars; however, I am referring to the physical act of “munching” food.
Chemical digestion is considered achemical change because enzymes in the stomach and intestines break down large macromolecules into simpler molecules so that the body can more easily absorb the food.
First, there are two types of digestion: mechanical and chemical.
Mechanical digestion does notresult in a chemical change, e.g. chewing**Chemical digestion results in a chemical change, e.g. digestion in the intestines.
Chemical digestion is considered a chemical change because enzymes in the stomach and intestines break down large macromolecules into simpler molecules so that the body can more easily absorb the food.
For example, an enzyme in the small intestine called lactase breaks down lactose, [math]C_{12} H_{22} O_{11}[/math], into two isomers of [math]C_{6} H_{12} O_{6}[/math], namely glucose and galactose. The reaction is: [math]C_{12} H_{22} O_{11}+H_2 O \to C_6 H_{12} O_6+C_6 H_{12} O_6+[/math]heat.
Therefore, enzymes, which are bio-catalysts, are what cause digestion to occur, and that’s why digestion is a chemical change.
**one may say that chewing is also chemical because we have an enzyme in our saliva, salivary amylase, which breaks starch into sugars; however, I am referring to the physical act of “munching” food.
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