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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.
What else can I help you with?
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.
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 makes a gas flame luminous?
A gas flame appears luminous when its temperature is high enough to excite and emit light in the visible spectrum. The presence of soot or other particulates in the flame can also contribute to its luminosity by scattering light. The type of gas being burned and the combustion conditions (such as airflow) can also influence the luminosity of a gas flame.
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.
What is the temperature that the Bunsen burner can go up to with the blue flame?
A Bunsen burner can reach temperatures of approximately 1,500 degrees Celsius (2,732 degrees Fahrenheit) when producing a blue flame. The blue flame indicates complete combustion of the gas, resulting in a hotter flame compared to the yellow flame produced by incomplete combustion. This high temperature makes it suitable for various laboratory applications and heating tasks.
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
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.
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
Why a luminous flame is not used as a source of heat in a laboratory experiment?
A luminous flame produces soot, which can contaminate the experiment or react with chemicals being used. In addition, the temperature of a luminous flame is not as high or consistent as a non-luminous flame, making it less suitable for precise heating applications in a laboratory setting.
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
When the air hole of a busen burner what flame can you see?
Please ask a question that makes sense
Why is it safer to close the air holes to obtain a luminous flame?
Oh, dude, closing the air holes restricts the airflow to the flame, which reduces the amount of oxygen available for combustion. This makes the flame less intense and decreases the chances of it getting out of control. So, yeah, it's safer because you're basically suffocating the flame a bit. Like, it's like putting a lid on a pot to simmer down the heat.
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 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.
Why would opening the air hole of a Bunsen burner makes the flame hotter?
Because your letting in Oxygen.
What makes a gas flame luminous?
A gas flame appears luminous when its temperature is high enough to excite and emit light in the visible spectrum. The presence of soot or other particulates in the flame can also contribute to its luminosity by scattering light. The type of gas being burned and the combustion conditions (such as airflow) can also influence the luminosity of a gas flame.
