A flame cannot be any cold but always hot even at the first instant it is lit.
A Bunsen burner flame can reach temperatures up to around 1,500 degrees Celsius (2,732 degrees Fahrenheit).
A sub-zero flame is a flame that burns at a temperature below the freezing point of water, which is 0 degrees Celsius (32 degrees Fahrenheit). These flames are typically created using special fuels or techniques to lower the temperature of the combustion process.
The hottest flame is the blue flame and the coolest flame is yellow.
The blue roaring flame is hotter because it indicates complete combustion of the fuel which leads to a more efficient release of energy in the form of heat. The blue color is a result of a higher amount of oxygen present in the flame, allowing for a more intense and hotter burn compared to a yellow flame which indicates incomplete combustion.
The external part of the flame is the coolest.
The safety flame, the cold one, is wavy.
Cold flame sparklers have a unique feature where they produce a cold flame that is safe to touch. This is different from traditional sparklers, which produce a hot flame that can cause burns if touched. Additionally, cold flame sparklers do not emit smoke or ash, making them a cleaner option for indoor use.
A blue flame is neither too hot or too cold as somebody else has said. But the gentle blue flame is good for heating something up with a temperature that is between the yellow safety flame and the roaring blue flame.
A Bunsen burner flame can reach temperatures up to around 1,500 degrees Celsius (2,732 degrees Fahrenheit).
To perform the cold flame experiment with phosphorus, you need white phosphorus, a glass container, a beaker of water, and safety equipment. Submerge the glass container in water to eliminate any air. Cut a small piece of white phosphorus and ignite it inside the container. The phosphorus will burn, producing a cold, greenish-white flame due to the presence of phosphorus pentoxide. Remember to wear appropriate safety gear and perform the experiment in a well-ventilated area.
The flame that you use the most is the safety flame. The safety flame is the yellow one it is not too hot and not too cold. The air hole should be half open for the safety flame and it makes a hissing sound. Your Welcome xx :D
If a beaker with cold water is held in a yellow burner flame, the water will begin to heat up as it absorbs the thermal energy from the flame. Eventually, the water will reach its boiling point and start to evaporate. It's important to note that the yellow flame indicates incomplete combustion, which can produce soot and carbon monoxide.
A gentle flame is not too hot and not too cold, the air hole should be half open for a gentle flame and it makes a hissing sound. Hope this helps- :D xx
hot air rises cold air sinks
lets take the candle as an example: the flame of the candle heats the surrounding air thus the cold air bushes the hot air up and takes its place because the cold air is much denser than the hot air, due to this motion the flame itself goes up with the hot air and so on.
Around a flame is the atmosphere, which is cooler. The part of a flame able to get the hottest, then, is the part in the middle that is most protected from the outside cold, so the middle part of the flame is hottest.
A sub-zero flame is a flame that burns at a temperature below the freezing point of water, which is 0 degrees Celsius (32 degrees Fahrenheit). These flames are typically created using special fuels or techniques to lower the temperature of the combustion process.