This week"s experiment originates from a inquiry that i got throughout an energy present this week. A college student asked what color flame was the hottest. The is a an excellent question, and the answer may fool you.

To inspection this, you will need:

a candlewooden toothpicks or matchsticksa metal spoona bowl of water

First a warning. We will be using the candle fire to burn the toothpicks. Be certain you have an adult through you and use typical sense. Don"t burn plastic as few of them produce toxic fumes when they burn.

Light the candle and look closely at the flame. At the bottom, girlfriend will watch an area the blue flame. Above that is the yellow part of the flame. If girlfriend look carefully, girlfriend will see a darker area in the center. If you look really closely (be cautious not come burn her nose) girlfriend may also see a very thin class of blue flame end the whole surface the the flame.

You are watching: Hottest part of a lighter flame

Now, which component of this fire is the hottest? allows see if we can use a wood toothpick to find out. Hold one toothpick and put the end of it into the blue area in ~ the base of the flame. An alert how long it takes for it to catch fire. Conveniently put the burned toothpick into the key of water. Shot the exact same thing in the flame just at the height of the wick. Go it record fire quicker? Yes. OK, now allows move upwards come the height of the dark area within the flame. Last, try holding a toothpick in ~ the really top of the flame. Which toothpick recorded fire quickest? The height one, right? So the is the hottest part of the flame, right? NO!

This is an instance of just how experiments have the right to be misleading. Actually, the hottest part of the candle fire is the blue part, at 2552 levels F (1400 C.) that is where the flame has actually the most oxygen and you are getting complete combustion. The reddish part is the coolest part, about 1472 F (800C).

Wait a minute. If the peak is not the sexy part, why go the toothpick burn the more quickly there? To gain an idea of the answer, revolve on the hot water in her sink. Hold a metal spoon in the currently of hot water for about 15 seconds. By that time, the spoon should have heated approximately the same temperature together the water. Eliminate the spoon indigenous the water and also touch it with your finger. Notification how warm it feels. Then very closely put your finger right into the stream of warm water. Walk it feeling hotter 보다 the spoon? yes! If they space the exact same temperature, why walk 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, heat moves indigenous the water to her finger, yet then the water flows past and your finger is now touching an ext water, which still has all its warmth energy. You have a continuous stream of fresh, hot water transferring heat to her finger, so her skin heats up faster than that did v the spoon. The exact same thing wake up in the candle flame. The boil gases of the flame space rising. Holding the toothpick in ~ the top of the flame means that it has a continuous stream of fresh heated gases flowing past it, for this reason the toothpick heats faster and also it bursts into flame. In ~ the bottom of the flame, it is an ext like the spoon. The toothpick cools the flame as the fire heats the toothpick, so it takes longer prior to the timber is set on fire.

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

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