Q:

Why is a burning candle a chemical change?

A:

Quick Answer

A burning candle is an example of a chemical change because the paraffin wax, which is a hydrocarbon, undergoes a chemical reaction with oxygen to form water and carbon dioxide gas. Because the chemical structure of the paraffin has been altered, this is a chemical change.

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Why is a burning candle a chemical change?
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Full Answer

A change is described as either physical or chemical. Physical changes alter the form that a substance or mixture is originally in, but the substance or mixture could, in theory, be returned to the original state through physical means. Chemical changes, however, involve changing the structure of the material at the atomic level. In order to extract the original reactants, another chemical change would have to occur.

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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.

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    Is digestion a chemical or physical change?

    A:

    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.

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    Is frying an egg a chemical change?

    A:

    Frying an egg involves a chemical change. The heat in the frying process gives energy to the egg's molecules and brings about a permanent change in the substance.

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  • Q:

    What happens during a chemical change?

    A:

    Alterations to the electron-based ionic or covalent bonds between ions or atoms happen during a chemical change. Such changes result in one or more new substances with different physical and chemical properties. This type of change stands in contrast to physical changes which, despite sometimes closely resembling chemical changes, only produce a change in physical properties.

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