Q:

Is digestion a chemical or physical change?

A:

Quick Answer

Because the process during digestion causes food to become a new substance, digestion is a chemical change. A physical change occurs when a subject changes its shape, size or state.

Continue Reading

Full Answer

Food is chemically digested by enzymes. Once food has been broken down, the nutrients are sent into the bloodstream where they find their way into the liver. The liver processes these nutrients and what is left works its way into the large intestine. There, it undergoes more of a chemical change as it is subjected to bacterial fermentation. It is in the large intestine that waste is produced and prepared for elimination from the body. Food provides the body with essential macronutrients that are extracted from it by the various chemical processes used during digestion.

Learn more about Chemistry

Related Questions

  • Q:

    Is gasoline burning a chemical change?

    A:

    Gasoline burning is an example of a chemical change, because this process produces water vapor and carbon dioxide. For something to be categorized as a chemical change, it must form new chemical substances. It also entails making and breaking molecular bonds. Another example is iron rusting, which forms iron oxide.

    Full Answer >
    Filed Under:
  • Q:

    What are some fast chemical reactions in everyday life?

    A:

    An example of a fast chemical reaction in everyday life is the process in which plants create their food, known as photosynthesis. Other examples include starting a fire, eating, baking and using batteries.

    Full Answer >
    Filed Under:
  • Q:

    What is physical digestion and chemical digestion?

    A:

    Physical digestion is the physical process of breaking down food into smaller pieces that can easily be accessed by digestive enzymes, without making any chemical changes, whereas chemical digestion refers to the process through which the mammalian body further breaks down food substances into small, soluble chemicals that can be absorbed into the blood. The chewing of food and movement in the stomach contribute to physical digestion while natural catalysts aid chemical digestion.

    Full Answer >
    Filed Under:
  • Q:

    What are three examples of chemical changes?

    A:

    Examples of chemical changes include burning of wood, digestion of sugar, an exploding firecracker, reactions between salts and acids and lighting a matchstick. A chemical change involves changes at the atomic and molecular level.

    Full Answer >
    Filed Under:

Explore