Bunsen_burner

 Bunsen_burner

device for combining a flammable gas with controlled amounts of air before ignition; it produces a hotter flame than would be possible using the ambient air and gas alone.

 

A Bunsen burner, named after Robert Bunsen, is a kind of gas burner used as laboratory equipment; it produces a single open gas flame, and is used for heating, sterilization, and combustion. The gas can be natural gas or a liquefied petroleum gas, such as propane, butane, or a mixture.

 

It is fully open when the handle is turned so that it is parallel to the jet. When the gas jet is opened, gas flows through the attached hose to the burner base. The amount of gas entering the burner tube is regulated by the needle valve at the base of the burner. If the valve is closed, gas flow is stopped.

 

A blue flame from a Bunsen burner transfers more energy than a yellow Bunsen flame as complete combustion gives a blue flame. Incomplete combustion gives a yellow flame and so less energy is released. When combustion is incomplete, a yellow flame is seen. This is because a yellow flame produces a lot of soot.

 

Hot plates are simple electrical appliances used to heat samples within the air. Hot plates are generally used when the desired temperature is above 100 degrees Celsius (212 degrees Fahrenheit) and are regarded to be much safer than open-flame heaters such as Bunsen burners.

 

After Bunsen and Desaga, other scientists and engineers continued to refine the design, introducing variations on it, including the Meker burner and the Tirrill burner. Burners based on all these designs are still used for heating and flame sterilization in the lab today.

 

Tirrill burners allow adjustment of both the air supply and the gas supply. They can be used with artificial gas, bottled liquid propane or natural gas.

 

A Meker–Fisher burner, or Meker burner, is a laboratory burner that produces multiple open gas flames, used for heating, sterilization, and combustion.

 


 

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