This blue edge is where the flame makes contact with the oxygen in the surrounding air and is the hottest part of the flame. If you look closely, you’ll notice that the candle flame has a thin blue halo. In this part, soot formation continues until the particles ignite. The next section of the flame is the yellow color we traditionally associate with candle flames. In this area, carbon continues to break down and forms hardened particles to create soot. The next area of the flame is a dark orange-brown color and relatively low in oxygen. Meanwhile, some of the carbon burns to create carbon dioxide. This area is very rich in oxygen, and as the hydrogen separates, it interacts with the oxygen to form water vapor. Source: Rido / What Else Can a Candle Flame Tell Us About the Combustion Reaction?Īt the base of the flame, you will find a blue area where the hydrocarbons vaporize into their component particles. That being said, you should take the steps outlined above to ensure that the candle flame burns cleanly and doesn’t create too much soot, which can be unpleasant to breathe in. The vaporized wax exists only right around the candle flame and quickly dissipates once the candle is extinguished. If you’re worried about breathing in candle wax, don’t be. Take care to keep the candle flame away from drafts and gusts, which will also cause it to burn unevenly. If the wick is too long, the candle will soak up too much fuel (i.e., melted wax) which is why you should always trim the wick down to ¼-inch each time before burning. However, if the candle flame still continues to stutter or smoke, you should check the candle to make sure it’s burning properly. After a few minutes, the candle flame will usually begin to burn steadily. This is more common right after you light the candle, while the combustion reaction is still stabilizing. This incomplete combustion can cause the flame to stutter or soot to form. Sometimes, the combustion reaction doesn’t go perfectly, and the candle gets either too much or too little fuel or air, resulting in incomplete combustion. Source: Gilang Prihardono / Why Does the Candle Flame Stutter or Smoke? This is enough heat to melt more wax and keep the combustion reaction going until you blow out the candle or the wick burns down. About 25 percent of the energy created by the combustion reaction is given off as heat. While there, they interact with the oxygen in the air into heat, light, water vapor and carbon dioxide.
Once the wax has been vaporized, the hydrogen and carbon molecules are pulled up into the flame. Specifically, the heat of the flame turns the wax from a solid to a liquid, and then a liquid to a gas by breaking down the hydrocarbons into separate molecules of hydrogen and oxygen. The melted wax acts as a fuel to keep the candle burning. When you light the wick, the wax heats up until it melts and then is soaked up by the wick.
No matter what type of wax your candle is made of, it’s essentially composed of hydrogen and carbon atoms, aka hydrocarbons.
Source: Vomirak / Where Does the Wax Go When You Burn a Candle? We also explain why incomplete combustion reactions can cause your candle to smoke and explore what the colors of a candle flame mean. But where exactly does that wax go, and are you breathing it in? Today, we’re delving into the science of burning soy wax candles to learn about combustion reactions and discover where wax goes when you burn a candle. You know that candle wax burns down and disappears whenever you light a candle.
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