Bunsen Burners

Paraffin burns because it reacts with oxygen in the air when exposed to a heat source. This reaction releases heat and light energy, causing the paraffin to combust and produce flames.

A Bunsen burner is used in experiments to provide a controlled and adjustable flame for heating, sterilizing, or combustion purposes. It allows scientists to apply heat to substances in a precise and efficient manner.

When sulphur is heated in the test tube in the absence of air the sulphur will break down and form a red-brown liquid. If oxygen comes into play sulphur dioxide is produced, however you should not that sulphur dioxide is a highly toxic gas and should only be produced in small amounts under a fume hood.

When the air hole is half open, the flame is called a "medium" or "moderate" flame. This means it is not burning too high or too low and is at an optimal level for cooking. Adjusting the air hole can help control the intensity of the flame.

To obtain a luminous flame on a Bunsen burner, adjust the air intake to decrease the amount of oxygen mixing with the gas. This can be done by partially closing the air hole at the base of the Bunsen burner. This will result in an incomplete combustion of the fuel, producing a yellow, sooty flame.

Water was left in the evaporation dish after the Bunsen burner was turned off because it takes time for the water to cool down to room temperature before it fully evaporates. Additionally, some of the water may have splashed onto the sides of the dish, leading to slower evaporation.

It is called a crucible.

The hole on a Bunsen burner should be closed to create a safety flame. This flame is smaller and more controlled, reducing the risk of accidents.

The Bunsen burner uses a blue flame, which is produced when air and gas mix in the burner tube and are ignited. This blue flame is hotter than a yellow flame and is commonly used for heating in laboratories.

It indicates that the air hole is closed.

The yellow flame is also called the luminous flame and the safety flame.

It is luminous due to small soot particles in the flame which are heated to incandescence. The yellow flame is considered "dirty" because it leaves a layer of carbon on whatever it is heating.It is considered safe as it is more visible than the near invisible and hot non-luminous flame (it can be obtained by half opening the air hole) as people would not mistake it as switched off and touch it. It is usually not used for heating as it's not as hot as the non-luminous flame(also called the blue flame).

The blue flame is hotter as it produces more heat energy than light energy, comparing it to the yellow flame, which produces more light energy than heat energy.

When you reduce the gas, the flame goes down because you are starving the flame.

Slowly turning off the gas is the correct way to put out a Bunsen burner. Never blow it out or gas will collect in the room.

A log burner is a type of stove or fireplace that burns wood logs to produce heat and warmth. It is a popular choice for heating homes and is often more energy-efficient and environmentally friendly than traditional open fireplaces.

Smelling the liquid in a test tube directly is not recommended due to the potential risks involved. The vapors from the liquid could be harmful or toxic, posing a health hazard when inhaled directly. Additionally, some substances may be volatile and easily evaporate, leading to a strong odor that could be overwhelming or cause respiratory irritation. It is safer to waft the vapors towards your nose gently using your hand to minimize the risk of exposure.

Using a Bunsen burner to evaporate a solution to dryness can lead to loss of volatile components or decomposition of sensitive compounds. It can also be dangerous due to the flammability of solvents. Therefore, it's often preferable to use gentle methods like rotary evaporation or desiccation to remove solvent from the solution.

Porcelain contains impurities such as iron oxide that can cause it to turn brown when exposed to high temperatures. These impurities react with the oxygen in the atmosphere during firing, leading to the discoloration.

There are three:

Safety flame: The hole is closed. Orange flame. Not too hot,

Blue flame: Hole half open. Almost invisible. Hot. Used for heating liquids,

Roaring blue flame: Hole open. Very hot blue part inside lighter coloured part. Used for heating solids.

Nothing! but if you keep it in for a while, the flame turns orange

A properly adjusted nonluminous flame on a Bunsen burner has two distinct cones: the inner blue cone, which is the hottest part where complete combustion occurs, and the outer yellow cone, which is where incomplete combustion occurs.

Since the invention of the Bunsen burner, there have been improvements in its design for better efficiency and safety. The development of alternative heating methods, such as hot plates and electric heaters, has also provided scientists with more options for laboratory heating. Additionally, advancements in technology have led to the creation of more sophisticated instruments and equipment for research and experimentation.

If the air vent is closed, there may not be enough oxygen for complete combustion, resulting in a yellow or orange flame due to the presence of unburned carbon particles. It is inefficient and can produce more soot and carbon monoxide.

A blue flame on a Bunsen burner is used for heating applications that require a high temperature and clean combustion, such as sterilizing, heating chemicals, or performing lab experiments that require intense heat.

The energy of the flame on a Bunsen burner can be changed by adjusting the air intake. By increasing the amount of air mixed with the fuel gas, a hotter, more intense flame can be produced. Conversely, reducing the air intake will result in a cooler flame.

To obtain a safety flame in the field of chemical engineering, it is important to have a well-designed and properly maintained safety program in place. This includes implementing safety protocols, training personnel on safety procedures, conducting routine safety inspections, and utilizing appropriate safety equipment. Additionally, promoting a strong safety culture within the organization is also key to achieving a safety flame.

Carbon dioxide(CO2) + Lime Water[Ca(OH)2] → Calcium Carbonate(CaC03) + Water(H2O)

The maximal temperature is in the roaring blue flame - up to 700 0C.