This week"s experiment comes from a inquiry that ns got throughout an energy present this week. A student asked what shade flame was the hottest. The is a great question, and the answer might fool you.

To investigate this, you will certainly need:

a candlewooden toothpicks or matchsticksa steel spoona key of water

First a warning. We will be utilizing the candle fire to burn the toothpicks. Be sure you have actually an adult through you and use typical sense. Don"t burn plastics as few of them produce toxic fumes once they burn.

Light the candle and also look carefully at the flame. In ~ the bottom, friend will see an area of blue flame. Over that is the yellow part of the flame. If friend look carefully, you will view a darker area in the center. If friend look an extremely closely (be mindful not to burn your nose) girlfriend may likewise see a really thin layer of blue flame over the entire surface of the flame.

You are watching: What part of a flame is the hottest

Now, which part of this flame is the hottest? lets see if we have the right to use a wood toothpick to find out. Hold one toothpick and put the end of it right into the blue area at the basic of the flame. Notification how lengthy it takes because that it to record fire. Quickly put the burnt toothpick into the bowl of water. Shot the same thing in the flame just at the peak of the wick. Did it capture fire quicker? Yes. OK, now lets move upwards to the top of the dark area inside the flame. Last, try holding a toothpick at the really top of the flame. Which toothpick caught fire quickest? The top one, right? So the is the hottest component of the flame, right? NO!

This is an instance of exactly how experiments can be misleading. Actually, the hottest part of the candle flame is the blue part, in ~ 2552 levels F (1400 C.) the is where the flame has the most oxygen and also you room getting finish combustion. The reddish part is the coolest part, around 1472 F (800C).

Wait a minute. If the height is not the sexty part, why did the toothpick burn the fastest there? To acquire an idea the the answer, turn on the hot water in your sink. Organize a metal spoon in the stream of warm water for about 15 seconds. By the time, the spoon should have actually heated approximately the very same temperature as the water. Eliminate the spoon indigenous the water and also touch it v your finger. An alert how warm it feels. Then closely put her finger into the currently of hot water. Go it feeling hotter than the spoon? correctly! If they room the very same temperature, why does the water feeling hotter? Heat power is moving from the spoon to her finger. The spoon is heating your finger, but her finger is cooling the spoon.

With the present of hot water, warm moves indigenous the water to your finger, but then that water operation past and also your finger is now touching much more water, i beg your pardon still has all its heat energy. You have a consistent stream that fresh, hot water transferring warm to her finger, so your skin heats up faster than that did v the spoon. The same thing happens in the candle flame. The heated gases of the flame room rising. Stop the toothpick in ~ the top of the flame method that it has actually a continuous stream of freshly heated gases flowing previous it, for this reason the toothpick heats faster and it bursts into flame. At the bottom of the flame, that is more like the spoon. The toothpick cools the flame together the fire heats the toothpick, so it takes longer prior to the wood is set on fire.

Once again, be safe and also be careful. Have actually a funny filled week.

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