Describe the different types of combustion, giving suitable examples.( answer in long )
Answers
Types of Combustion
1] Complete Combustion
One of the types of combustion is Complete Combustion. Complete combustion occurs in an unlimited supply of air, oxygen in particular. Also, complete combustion is also known as clean combustion. Here the hydrocarbon will burn out completely with the oxygen and leave only two byproducts, water, and carbon dioxide.
An example of this is when a candle burns. The heat from the wick will vaporize the wax which reacts with the oxygen in the air. The two products of the reaction are water and carbon dioxide. In an ideal situation all the wax burns up and complete combustion takes place
2] Incomplete Combustion
Incomplete combustion takes place when the air is in limited supply. And as opposed to complete combustion it is otherwise known as dirty combustion. Due to lack of oxygen, the fuel will not react completely. This, in turn, produces carbon monoxide and soot instead of carbon dioxide.
An example is burning of paper. It leaves behind ash (a form of soot) as a byproduct. In a complete combustion, the only products are water and carbon dioxide. Also, incomplete combustion produces less energy than complete combustion.
3] Rapid Combustion
Another type of combustion is Rapid Combustion. Rapid energy needs external heat energy for the reaction to occur. The combustion produces a large amount of heat and light energy and does so rapidly. The combustion will carry on as long as the fuel is available.
An example is when you light a candle. The heat energy is provided when we light the candle with a matchstick. And it will carry on till the wax burns out. Hence it is a rapid combustion
4] Spontaneous Combustion
As the name suggests the combustion occurs spontaneously. This means that it requires no external energy for the combustion to start. It happens due to self-heating. A substance with low-ignition temperatures gets heated and this heat is unable to escape.
The temperature rises above ignition point and in the presence of sufficient oxygen combustion will happen. The reaction of alkali metals with water is an example.
5] Explosive Combustion
Explosive Combustion happens when the reaction occurs very rapidly. The reaction occurs when something ignites to produce heat, light and sound energy, The simple way to describe is it to call it an explosion. Some classic examples are firecrackers or blowing up of dynamite
Hope it helps
COMBUSTION
Combustion is a technical term for burning, which is a chemical process that occurs when a fuel reacts with an oxidant to produce heat. Some common examples of combustion include burning wood to heat a home, the burning of petrol to run a car and the combustion of natural gas to cook on a stovetop.
The process of combustion can be broken down into different classifications based on the energy it needs to occur and the byproducts of the reaction. Here’s a closer look at five types of combustion:
1. Complete Combustion
Complete combustion requires a combination of fuel and oxygen. During the combustion process, the reactant is completely burned in oxygen, leaving a limited amount of byproduct. When a hydrocarbon is burned in oxygen, the reaction will usually lead to the production of carbon dioxide and water.
When other elements are burned, they typically leave commonly known oxides leftover. For example, carbon will produce carbon dioxide, nitrogen leads to nitrogen dioxide and sulfur will yield sulfur dioxide.
2. Incomplete Combustion
Incomplete combustion occurs when there is not enough oxygen for the fuel to fully react. In this case, the byproducts, carbon dioxide and water, are not produced. Instead, the reaction will leave behind carbon monoxide and soot. Incomplete combustion also produces less energy than complete combustion, making it less efficient overall.
3. Rapid Combustion
When rapid energy requires external heat energy for a reaction to occur, it is classified as rapid combustion. This reaction will continue to remain live until all of the fuel is burned up. As a byproduct, this form of combustion produces large amounts of heat and light energy at a rapid pace.
One common example of this occurs when you light a candle. The combustion reaction takes place when a flame ignites the wick, producing a constant light that doesn’t stop until all of the wax has been burned through.
4. Spontaneous Combustion
Spontaneous combustion received its name because no outside energy is required for the reaction to begin. It occurs spontaneously. During spontaneous combustion, an increase in temperature due to an internal reaction, followed by thermal runaway and the presence of sufficient oxygen will start the process. Once the fuel reaches a temperature that is high enough, it will ignite all on its own. For example, phosphorus will self-ignite at room temperature without any application of heat.
5. Explosive Combustion
Explosive combustion is exactly what you would expect; an explosion. This type of combustion occurs at an extremely rapid pace. When a force is used to ignite the fuel, heat, light and sound energy are produced immediately. One common example of this can be seen in fireworks. When a spark lights the fuse, the fireworks explode, causing heat, light and sound.
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