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Does gold change its state when burned?

Updated: 8/11/2023
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15y ago

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This is sorta awkward. Gold doesn't really "burn" in the general sense. Take some solid gold and heat it. When it gets hot enough (1064.18 °C or 1947.52 °F), it melts. It was a solid, and now the gold has changed state to become a liquid. But here's the catch. Gold, which is called a noble metal, just sits there molten. That's because it doesn't like to react with anything, and that means it is extremely difficult to "burn" gold. It won't oxidize (combine with oxygen), which is the basis for most "burning" in the conventional sense. (There are other forms of burning, but we'll set them aside for now.) Our liquid gold? Continue heating it and it will change state to a gas and boil away. Just like water would. The term "burning" doesn't really represent a change of state. A change of state is a transition from solid to liquid to gas to plasma or back the other way. (Yes, some things change from solid directly to a gas and such, but let's look at the basics.) If we take ice and heat it, it melts. Keep heating it and it changes to steam. But it is still water. That's the key to change of state. In a change of state you don't chemically change the "stuff" you are heating or cooling - like the water we spoke about. When we "burn" something, chemical reactions take place, and the original chemical elements and compounds involved are changed by rearrangement. Gasoline is composed of a bunch of different hydrocarbons. If we burn it completely in air (with oxygen), the end products are water and carbon dioxide. (Set aside the other combustion byproducts that occur at elevated temperatures and pressures and that appear with incomplete combustion.) Burning liquid gasoline does not change its state but changes its chemistry. So burning something really doesn't represent a change of state. Gold is an interesting metal and an interesting chemical element. A link is provided to the Wikipedia article on gold in case you want to do some additional reading. The pics alone are worth Surfing on over for.

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Q: Does gold change its state when burned?
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