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It indicates that the air hole is closed.
The yellow flame is also called the luminous flame and the safety flame.
It is luminous due to small soot particles in the flame which are heated to incandescence. The yellow flame is considered "dirty" because it leaves a layer of carbon on whatever it is heating.It is considered safe as it is more visible than the near invisible and hot non-luminous flame (it can be obtained by half opening the air hole) as people would not mistake it as switched off and touch it. It is usually not used for heating as it's not as hot as the non-luminous flame(also called the blue flame).
The blue flame is hotter as it produces more heat energy than light energy, comparing it to the yellow flame, which produces more light energy than heat energy.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoNot much, Its use as a 'safety flame' because its no where near as hot and is more visible to the naked eye. The yellow flame is also the way that the Bunsen is lit ie with the air hole closed. It is a very dirty flame as it is full of unburnt carbon. Anything that is heated in it gets covered in black soot. It is really only used for safety. It is easy to see when the flame is not in use.
The blue flame with the air hole open is very hot but not so easy to see in bright light.
Wiki User
∙ 7y agoIn any heat source that produced by the flames, the color indicate the temperature. Blue is the hottest followed by yellow and orange.
Wiki User
∙ 11y agoThe yellow flame of a Bunsen burner indicates the presence of carbon particles (soot) and an incomplete combustion of methane gas.
Wiki User
∙ 6y agoThat the flame is still 400 degrees and you should not touch it
Wiki User
∙ 7y agoThe gas is not completely burned.
Wiki User
∙ 6y agoThe temperature is under 400 oC.
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How hot can the yellow flame get on a Bunsen burner?
As hot as yo mam in a oven with ya dad and a finger licking kfc bargin bucket full of diamond encrusted platapus and you are a flamingo man boris johnson will be king! BACON!
What is the difference between Bunsen burner and alcohol lamp?
Bunsen Burner: - Uses Gas - Achieves up to roaring blue flame - Used to melt solid objects Alcohol Lamp: - Uses Alcohol - Achieves Yellow flame only - Used to boil water
Which bunsen burner luminous or non luminous flame used in laboratory and why?
The blue flame is used because it is the hottest.
What is a Bunsen burner striker used for?
It produces a spark which ignites the gas.
Bunsen burner parts?
A normal Bunsen burner has a chimney which contains gas, a collar to adjust the air hole, a air hole that will leak gas, a gas tap that provides gas to the burner and the rubber tubing leads gas to the burner.
What is the yellow flame used for in a Bunsen burner?
As a safety flame, keep it on this if the burner is not in use :)
Why is a blue Bunsen burner flame better than a yellow flame?
A blue Bunsen burner flame is not necessarily "better". A yellow Bunsen burner flame just shows that it is on, but is usually too big to actually be able to heat something safely. Blue means the flame is smaller (though hotter), and is used to heat.
Why is the blue flame on the Bunsen burner used for heating?
It's hotter than the yellow flame.
How used a Bunsen burner?
The Bunsen burner is an instrument, with flame, used for heating in laboratories.
What is the function Bunsen burner?
The Bunsen burner is an instrument, with flame, used for heating in laboratories.
What is a Bunsen burner which is a laboratory tools?
The Bunsen burner is an instrument, with flame, used for heating in laboratories.
How hot can the yellow flame get on a Bunsen burner?
As hot as yo mam in a oven with ya dad and a finger licking kfc bargin bucket full of diamond encrusted platapus and you are a flamingo man boris johnson will be king! BACON!
What is turned to used to change the type of flame a Bunsen burner produces?
You would turn the collar on a Bunsen Burner so that the holes are exposing the flame to more oxygen to produce a blue flame. Close the holes by turning the collar to turn it back to the yellow (dirty) flame.
What type of flame is used for heating in Bunsen burner?
The yellow flame is considered a safe flame. If you are using the Bunsen to heat you would open the air vent so the flame turns blue, try heat on a yellow flame and it'll end up covered in soot.
What is the collar on a Bunsen burner for?
It is used for adjusting the flame
What is a collar for on a Bunsen burner?
It is used for adjusting the flame
If the yellow flame on the Bunsen burner is used to heat an object what happens to the object?
The yellow flame has a reducing action. The effect depends on the nature of the material in contact with the flame, the duration of this contact, etc.
