Bunsen Burners

The adjustment valve in a Bunsen burner controls the flow of gas, allowing the user to regulate the flame size and intensity. By turning the valve, the amount of gas entering the burner can be adjusted, resulting in a smaller or larger flame.

If the air hole of a Bunsen burner is closed, the flame will burn yellow with a lower temperature and produce less heat compared to when the air hole is open. The amount of heat produced would be reduced as the combustion is incomplete due to the lack of sufficient oxygen.

When the hole on a Bunsen burner is half open, it typically produces a roaring noise caused by the turbulent flow of gas and air mixing. This noise indicates that the flame is not burning efficiently and could be producing soot or incomplete combustion. Adjusting the air and gas flow can help create a more stable and quieter flame.

For safety reasons, a Bunsen burner should be lit only when it is being used and should be extinguished immediately after use. It is typically lit at a medium length flame that is tall enough to provide heat for a reaction but not so high that it is flickering or creating soot.

The inner cone of a Bunsen burner is where complete combustion of the gas occurs. The air hole at the base of the burner allows air to mix with the gas, creating a hot, blue flame. Adjusting the air flow controls the height and intensity of the inner cone flame for different heating needs.

The blue flame on a Bunsen burner is the hottest because it is a complete combustion of gas with the right mixture of air. The blue color indicates that the flame has enough oxygen for efficient combustion, resulting in higher temperatures compared to a yellow flame.

The yellow flame is not suitable for heating in a Bunsen burner because it is a cooler, less efficient flame that produces soot and lacks complete combustion, resulting in lower heat output. The blue flame, on the other hand, is hotter, more efficient, and produces clean combustion, making it ideal for heating applications.

The yellow flame (or luminous flame) should not be used because

1. It is less hot that the blue flame (or non-luminous flame)

2. It produces soot, as compared to the blue flame which is the clean flame

The Bunsen burner can reach temperatures as high as 1,500 degrees Celsius (2,732 degrees Fahrenheit) depending on the fuel source and air supply.

Bunsen burners are quite safe. Obviously you need to light them as soon as you turn

on the gas. You need to keep the air vent clean and be sure the gas line does not

leak. Of course, do not let the flame near anything that will burn, including your fingers.

The inner blue flame on a Bunsen burner is silent because it has a well-balanced mixture of gas and air, causing complete combustion with minimal noise. The outer yellow flame is louder due to incomplete combustion and turbulence in the flame.

The non-luminous flame on a Bunsen burner, also known as the blue flame, is used for heating because it produces a high-temperature, clean, and efficient flame. This type of flame provides a consistent and focused source of heat that is ideal for tasks like sterilizing equipment, melting solids, or conducting chemical reactions.

Water has a higher specific heat capacity than gold, meaning it requires more energy to raise its temperature. This is because water molecules can hold more heat energy due to their intermolecular structure compared to gold. As a result, more energy is needed to increase the kinetic energy of water molecules and raise the temperature of water.

The part on a Bunsen burner that controls the size of the flame is called the needle valve or air inlet. By adjusting this valve, you can regulate the amount of air mixed with the gas, which in turn controls the size and type of flame produced.

The hole in the center of the Bunsen burner flame is caused by air being drawn into the flame and mixing with the gas, promoting efficient combustion. This produces a hot, blue inner flame that is ideal for heating purposes. The outer, cooler part of the flame is yellow due to incomplete combustion.

A nichrome wire is commonly used to spread the heat from a Bunsen burner due to its high melting point and good heat conduction properties.

Carbon particles are created by incomplete combustion of the methane gas.

The balance chemical formula for the combustion taking place is as follows:

CH4(g) + 2O2(g) ---> 2H2O (g) + CO2(g)

Non-luminous flames are flames that do not emit visible light. These flames occur when there is not enough oxygen available for complete combustion to take place. As a result, the flame appears mostly blue or invisible to the naked eye.

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

the gas cannot be controlled however the oxygen can. Gas is passed through and the valve can be turned to allow more or less oxygen in, the more exposed the gas is to oxygen, the more intense the flame.

As you are aware, the flammable gas goes into a Bunsen Burner through the rubber tube. To burn the gas, you need oxygen, in air. By controlling the amont of air available, you vary the colour, temperature and ferocity of the flame.

Te air inlet is a hole at the base of the tower. It has a collar around it which can be rotated to vary the amont of air available.

If the collar is closed, no extra air is added and the only available oxygen comes from the air around the flame. With so little oxygen, the gas doesn't burn to completion and carbon soot is produced. This makes the flame yellow and clearly visible (for safety sake) but not as hot.

If the collar is fully open, air is pulled in through the inlet and mixed with the gas before burning. This provdes more oxygen, a hotter flame and more complete combustion to carbon dioxide and water. This flame is blue with a roaring sound and can be almost invisible to the casual abserver.

In practice, always light a Bunsen Burner with the collar closed so that you can see the yellow flame but open the collar to give ablue flame when heating. This avoids coating everything in soot. When you have finished, close the collar again to leave the flame clearly visible and yellow for everyone to see.

Porcelain will turn black when heated over a Bunsen burner due to carbon deposits from incomplete combustion of the gas. The carbon particles are deposited on the surface of the porcelain, causing it to appear black.

The blue flame of a Bunsen burner is hotter than the yellow flame. When a metal object is held in the blue flame for a long time, it absorbs heat and emits light, resulting in the metal glowing red due to incandescence. This happens as the metal reaches a temperature at which it begins to emit visible light.

For boiling a solution, a medium to high intensity flame is typically used to provide enough heat to raise the temperature of the solution to its boiling point. Adjust the flame intensity based on the size of the container and the volume of the solution being heated.