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Luminous flames are formed when the energy released is at a certain part of the electromagnetic spectrum. A red flame is given off when the energy is at the same energy and wavelength of red light. A yellow sooty flame is much lower energy and caused by a lack of oxygen.
Burning fuels produce heat. Heated atoms and/or molecules emit a photon as they return to a lower energy state.
Look at various flames, You may see concentric areas that are like layers, each one a different color. The fuel breaks up or is oxidized differently in each layer and each has a distinct temperature and chemical makeup.
Not all emitted light from a flame is visible, a lot is emitted in the infrared spectrum which we cannot see but will feel as it heats our skin. Some flames are totally invisible, like from hydrogen.
Some emitted light is only at very specific (narrow) frequencies, which we will see as certain colors, light and dark blue from methane premixed with air in a Bunsen burner or stove-top gas range.
Hot carbon atoms emit over a very wide range of frequencies at random, so we see yellow light from candles.
If hot enough, carbon emits a bluish white light, like from acetylene/oxygen.
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoThe flame of a Tirrell burner (a type of adjustable Bunsen burner) is luminous for the same reason that any flame is luminous. The energy released by the combustion reaction heats the gases to the point where excited electrons emit light.
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Why does turning the collar on a busen burner make the flame hotter?
Flames need air to expand and grow, or become hotter. The oxygen circles the flame and makes the flame alter. The collar allows air to get to the flame.
Which flame on a Bunsen burner is used to heat chemicals?
It depends what you want to do! A blue flame is typically much hotter than a yellow flame. Sometimes you want to heat something very hot, and sometimes you want to heat something gently... and so you can choose which part of the flame best suits the purpose! blue flame
What is the purpose of a collar on a Bunsen burner?
It's the part of the Bunsen burner which lets in air, adjusting the strength of the flame. basically the hole at the bottom with the twisty bit.
Is the blue flame on the Bunsen burner called the safety flame?
No. The blue flame is called the roaring flame because it makes a sort of hissing sound, it is also not called the safety flame because it emits very little light so it is a hazard. It is a hazard because you can not see it very well so it is dangerous.
Color of flame in a complete combustion of gas from Bunsen burner?
When the air hole is covered on the Bunsen Burner its oxygen supply is made smaller. This makes the flame turn YELLOW - This is considered to be the safety flame as it is the most visible to the eye and it radiates less heat. When the Bunsen burners air hole is fully open there is a super heated blue flame which is the product of complete combustion. Hope this helped :)
What is the dominant color of a luminous flame in a Bunsen Burner?
the orange flame (when the oxygen wholes are closed it makes an orange flame) because when it is on the blue flame (when the oxygen wholes are open) it is very hard to see and almost invisible
What is makes the flame luminous?
How: by opening up the air hole on a Bunsen burner after it is turned on.........What: Some atoms or molecules are not luminous when hot. They emit light outside the spectrum we can see, like CO2 emits infrared. Others only emit a faint color in the flame.The non-luminous is made when there is a complete combustion or complete burning process. It happens when there is more than the enough oxygen in the surroundings or in the place where the process will happen.
What are the advantages and disadvantages of each type of flame of the Bunsen burner?
It is less hotter than non luminous flame. Used for lighting only It produces soot that makes apparatus sooty
What are Two kinds of flame?
the yellow/safety flame - thats the one that burns less the blue flame - burns THE ROARING FLAME - that one burns a lot and you can tell the difference from the blue flame because it makes a roaring sound
Why should a lit Bunsen burner never be left unattended?
It is dangerous as other people may just place their hand or other objects over the Bunsen burner causing injuries or burns, especially if it is a non-luminous flame which makes it difficult to tell that the burner is actually lit. You should always switch off the Bunsen burner before leaving to prevent injuries to others and yourself.
Why a luminous flame is not used as a source of heat in a laboratory experiment?
Because it makes the apparatus black when heating
When the air hole of a busen burner what flame can you see?
Please ask a question that makes sense
What allow the flame to be at a suitable height for burning in Bunsen burner?
I think the amount of gas released makes sure the flame isn't too much.
Which is more useful between an alcohol lamp and Bunsen burner?
A Bunsen Burner is more useful because its flame is more controllable , it can reach a roaring blue flame, and its features such as the collar and the gas controller makes it safer.
Why would opening the air hole of a Bunsen burner makes the flame hotter?
Because your letting in Oxygen.
Why does turning the collar on a busen burner make the flame hotter?
Flames need air to expand and grow, or become hotter. The oxygen circles the flame and makes the flame alter. The collar allows air to get to the flame.
Which flame on a Bunsen burner is used to heat chemicals?
It depends what you want to do! A blue flame is typically much hotter than a yellow flame. Sometimes you want to heat something very hot, and sometimes you want to heat something gently... and so you can choose which part of the flame best suits the purpose! blue flame
