Q:

Is burning a candle a chemical change?

A:

Chemical changes are changes on the atomic level due to bonds forming or breaking, creating new compounds; burning a candle is an example. Candle wax functions as a fuel that reacts with oxygen in the air when exposed to high enough temperatures, producing carbon dioxide, water vapor, light and heat.

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Full Answer

Chemical changes occur during chemical reactions between elements or compounds, and they are responsible for all of the complex compounds in the universe. The likelihood of an element or compound undergoing a chemical change depends on its atomic structure and is called its reactivity. A higher reactivity correlates to an increased tendency to form bonds.

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Related Questions

  • Q:

    How long does a candle burn?

    A:

    The burn time of a candle depends on its weight. It is easy to calculate how long a candle will burn with an easy-to-use formula.

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  • Q:

    How long will a candle burn?

    A:

    How long a candle burns depends on several variables, including the type of wax used, the type of wick, the presence of additives and the candle's size. Typically, smaller candles with smaller wicks can be expected to burn at a rate of 7 to 9 hours per ounce of wax.

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  • Q:

    Where does candle wax come from?

    A:

    Candle wax comes from a variety of sources, including beeswax, tallow, purified animal fats and paraffin wax. Except for beeswax, these waxes are often refined, melted to a specific melting point and combined with additives to make the desired candle.

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  • Q:

    What are chemical reactions that release energy?

    A:

    Chemical reactions that release energy are described by Education.com as exothermic reactions, and their equations follow the form: reactants = products + energy. Examples of exothermic reactions are explosions, such as fireworks, or combustion, such as with engines. The reactants of exothermic reactions contain stored energy which is then released as exothermic heat once the chemical reaction has occurred, states Scientific American.

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