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How does adjusting the needle valve on the Bunsen burner affect the flame?
Wiki User
∙ 11y ago
The needle valve or flow valve controls the flow of gas into the Bunsen Burner.
Wiki User
∙ 11y ago
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Why is the blue flame the hottest in science?
because you have the vents open on the bunsen burner the flame is getting more oxygen, making it hotter. Different flame types of Bunsen burner depending on flow through the throat holes (holes on the side of the Bunsen burner -- not to be confused with the needle valve for gas flow adjustment). 1) air hole closed (Safety flame used for when not in use or lighting). 2) air hole slightly open. 3) air hole half open. 4) air hole almost fully open (this is the roaring blue flame).
What is a tirrill?
In the context of chemistry, this is likely to refer to a type of burner. The difference between a Bunsen burner and a Tirrill burner has to do with how the air flow is regulated ... a Bunsen burner usually has slits at the base of the barrel to admit air, while in a Tirrill burner the airflow is controlled by means of a needle valve. Burners in a real chemistry lab are actually more likely to be of the Tirrill type than the Bunsen type, since the needle valve allows better regulation of the air-gas mixture and therefore a steadier more reliable flame. There are some other modifications as well (the most common one being the Meker, which is the one with the "big head" that has a grid inside it, which spreads the heat more evenly). I've also seen a kind with horizontal slits where incoming air is regulated by screwing the entire barrel up and down (this is less common, as the barrel may become uncomfortably warm to touch, though it usually takes some time for this to happen and the adjustment of the air/gas mix usually happens immediately after the burner is ignited). I don't know if that type has an official name, or if so what it is.
What needle is used for chemotherapy?
A Huber Needle.
What is needle suspension also called?
Needle bladder neck suspension
What is flame byxis special move?
it is destiny needle, and magnetic needle storm. :)
How does adjusting the needle valve on the Bunsen burner affects the flame?
The needle valve or flow valve controls the flow of gas into the Bunsen Burner.
Uses of needle valve in Bunsen burner?
The needle valve is used to control the amount of gas flowing to the burner. The air valve controls the amount of air.
Why are all manipulations of bacteria culturing carried out next to a lit Bunsen burner?
The lit Bunsen burner is used to sterilize the loop, needle, and the openings of test tubes containing cultures, or that will be inoculated.
What Are The 4 Bunsen Burner Flames?
The four(4) flame types of Bunsen burner is depending on flow through the throat holes (holes on the side of the Bunsen burner -- not to be confused with the needle valve for gas flow adjustment). 1) air hole closed (Safety flame used for when not in use or lighting). 2) air hole slightly open. 3) air hole half open. 4) air hole almost fully open (this is the roaring blue flame).
Why is the blue flame the hottest in science?
because you have the vents open on the bunsen burner the flame is getting more oxygen, making it hotter. Different flame types of Bunsen burner depending on flow through the throat holes (holes on the side of the Bunsen burner -- not to be confused with the needle valve for gas flow adjustment). 1) air hole closed (Safety flame used for when not in use or lighting). 2) air hole slightly open. 3) air hole half open. 4) air hole almost fully open (this is the roaring blue flame).
Use of rotameter with needle valve?
what is the proper procedures for cheking and adjusting the needle valve
What is a tirrill?
In the context of chemistry, this is likely to refer to a type of burner. The difference between a Bunsen burner and a Tirrill burner has to do with how the air flow is regulated ... a Bunsen burner usually has slits at the base of the barrel to admit air, while in a Tirrill burner the airflow is controlled by means of a needle valve. Burners in a real chemistry lab are actually more likely to be of the Tirrill type than the Bunsen type, since the needle valve allows better regulation of the air-gas mixture and therefore a steadier more reliable flame. There are some other modifications as well (the most common one being the Meker, which is the one with the "big head" that has a grid inside it, which spreads the heat more evenly). I've also seen a kind with horizontal slits where incoming air is regulated by screwing the entire barrel up and down (this is less common, as the barrel may become uncomfortably warm to touch, though it usually takes some time for this to happen and the adjustment of the air/gas mix usually happens immediately after the burner is ignited). I don't know if that type has an official name, or if so what it is.
What is a Bunsen burner and what is it's uses?
From Wikipedia (see Link to the left):A Bunsen burner is a device used in scientific laboratories for heating, sterilization, and many other uses.The device safely burns a continuous stream of a flammable gas such as natural gas (which is principally methane) or a liquified petroleum gas such as propane, butane, or a mixture of both.From ScienceByJones.com (see Link to the left):The Bunsen burner is used frequently in the laboratory as a source of heat. This burner is designed so that gaseous fuel may be mixed with the correct amount of air to yield the maximum amount of heat. In order to use this burner properly and safely, it is essential that you understand its construction and the adjustments that can be made.The three principal parts of the burner are: barrel, needle valve, and base. The quantity of gas admitted to the burner is controlled by the needle valve, while the air needed for combustion is admitted at the small opening around the bottom of the barrel. The air is controlled by turning the barrel so as to make the air holes larger or smaller.Always open the desk outlet valve fully and regulate the gas supply to the burner by the needle valve. Always extinguish your burner by turning off the desk outlet valve (and then closing the needle valve and barrel.) If there is an accident always shut off the desk outlet valve immediately.STEPS TO LIGHT BUNSEN BURNER:1. Check connections to burner and desk outlet valve.2. Close needle valve and barrel.3. Open desk outlet valve fully.4. Check for leaks with flame.5. While holding flame above barrel, open needle valve 1/2 turn.6. Adjust barrel and needle valve for blue in blue flame.Always light burner in open space on lab counter. After you have adjusted it for the flame needed move it into position. One person in lab group is always responsible for maintaining the burner and flame.Burner Procedure:1. Light the burner according to our rules. Observe the yellow flame which is produced because not enough air is admitted to give complete combustion. The yellow color is caused by small particles of unburned carbon which become incandescent.2. Now rotate the barrel until the flame is entirely blue. Two different zones should appear when the burner is correctly adjusted. Too much air should not be admitted as it may cool the flame or blow it out entirely. After having the teacher confirm a good hot, blue flame draw a diagram of the flame (use labels and descriptions). Indicate on your diagram of the flame where the hottest part of the flame is located.See the Web Links to the left for more information.Bunsen burner barrels can be rotated, either opening or closing the barrel, to adjust the flow of air or oxygen, thereby controlling the flame.
Flaming an inoculating loop?
There is no "set" time limit. For proper aseptic technique, you should wait until the inoculating loop/needle is visibly red so that all organisms are dead, etc.
What is a Bunsen burner and its parts and how is it used?
From Wikipedia (see Link to the left):A Bunsen burner is a device used in scientific laboratories for heating, sterilization, and many other uses.The device safely burns a continuous stream of a flammable gas such as natural gas (which is principally methane) or a liquified petroleum gas such as propane, butane, or a mixture of both.From ScienceByJones.com (see Link to the left):The Bunsen burner is used frequently in the laboratory as a source of heat. This burner is designed so that gaseous fuel may be mixed with the correct amount of air to yield the maximum amount of heat. In order to use this burner properly and safely, it is essential that you understand its construction and the adjustments that can be made.The three principal parts of the burner are: barrel, needle valve, and base. The quantity of gas admitted to the burner is controlled by the needle valve, while the air needed for combustion is admitted at the small opening around the bottom of the barrel. The air is controlled by turning the barrel so as to make the air holes larger or smaller.Always open the desk outlet valve fully and regulate the gas supply to the burner by the needle valve. Always extinguish your burner by turning off the desk outlet valve (and then closing the needle valve and barrel.) If there is an accident always shut off the desk outlet valve immediately.STEPS TO LIGHT BUNSEN BURNER:1. Check connections to burner and desk outlet valve.2. Close needle valve and barrel.3. Open desk outlet valve fully.4. Check for leaks with flame.5. While holding flame above barrel, open needle valve 1/2 turn.6. Adjust barrel and needle valve for blue in blue flame.Always light burner in open space on lab counter. After you have adjusted it for the flame needed move it into position. One person in lab group is always responsible for maintaining the burner and flame.Burner Procedure:1. Light the burner according to our rules. Observe the yellow flame which is produced because not enough air is admitted to give complete combustion. The yellow color is caused by small particles of unburned carbon which become incandescent.2. Now rotate the barrel until the flame is entirely blue. Two different zones should appear when the burner is correctly adjusted. Too much air should not be admitted as it may cool the flame or blow it out entirely. After having the teacher confirm a good hot, blue flame draw a diagram of the flame (use labels and descriptions). Indicate on your diagram of the flame where the hottest part of the flame is located.See the Web Links to the left for more information.Bunsen burner barrels can be rotated, either opening or closing the barrel, to adjust the flow of air or oxygen, thereby controlling the flame.
How do you adjust the shift needle on a 1992 Dodge Dynasty 3.3?
Yeah, this is a good one. you need to remove the shift needle housing from the instrument cluster and manually set the needle by adjusting the string that moves it.
What is the function of the needle valves on a welding torch?
To adjust gas flow therefore adjusting flame intensity.
