Blue flames usually appear at a temperature between 2,600º F and 3,000º F. The color blue indicates a temperature even hotter than white. Likewise, the portion of a flame closest to a candle or a piece of wood might also have blue mixed in with the white. For example, if you have a gas stove at home or have ever seen one operate, you know that the natural gas flames are mainly blue. There's one other color you may have seen appear in flames on a regular basis: blue. The farther away from the fuel source that the flame reaches, temperature decreases, leading to the bulk of a flame often being orange while the tip is red. The part of the flame closest to the candle or the wood will usually be white, since the temperature is usually greatest near the fuel source. You can see these differences for yourself by observing a candle flame or a piece of burning wood. When temperatures approach 2,400º F to 2,700º F, flames appear white. Flames turn orange when the temperature reaches 2,000º F to 2,200º F. Scientists have learned that red flames correspond to temperatures from 980º F up to 1,800º F. Let's first take a look at the effect temperature has on the color of flames. Two of the most important factors are temperature and the chemical composition of the fuel. We can easily feel the heat from combustion, and we can see the emitted light in the form of flames.įlames take on different colors for various reasons. Scientists define combustion (what we call burning) as a reaction between a fuel, such as natural gas, oil, or wood, with an oxidant compound, such as oxygen. So what causes flames to burn with different colors? While the majority of the flames hover between the hues of orange and yellow, we also catch glimpses from time to time of other colors, including red, white, and blue. We enjoy seeing the different colors they take on as they burn brightly. It's easy to get entranced by the flicker of the flames. We love to watch the flames jump up and down, slowly toasting the marshmallows to golden-brown perfection. Of course, one of our favorite parts of making s'mores is roasting the marshmallows over an open fire. We're getting hungry right now just thinking about them! Do you love s'mores? Who doesn't, right? All that marshmallowey, chocolatey, and graham-crackery goodness all smooshed together.
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