Combustion and Respiration

Let us first look at combustion

Combustion is a process of burning something.

Combustion produces high temperature and release of heat.

Any substance burnt to produce heat is treated as fuel for combustion. So it becomes more important to understand about different types of fuels.

Burning of fuel produces energy

A fuel is any material that can be made to react with other substances so that it releases energy as heat energy or to be used for work

Based on the state of matter, fuels can be classified into three categories as shown above

Coal is an important solid fuel.

Petrol and diesel are important liquid fuels.

Propane and butane are important gas fuels.

Conditions required for fire are as follows.

Three things are required in proper combination before ignition and combustion can take place are as shown above

The requirements for fire or combustion can be seen in the form of triangle as shown above

There must be heat (ignition temperature) to start and continue the combustion process.

There must be fuel to burn.

There must be air to supply oxygen for combustion.

So, air is must for combustion just like it is a must for human life in the form of respiration.

Respiration is the process in which gas is exchanged between organisms and their habitat.

In more generic way, it is the movement of oxygen from the outside environment to the body and the transport of carbon dioxide in the opposite direction.

Basically, in both respiration and combustion, oxygen is required

Hence, let us try to compare these two phenomena

Comparison between Respiration and Combustion.

In both combustion and respiration, oxygen in consumed.

And in both combustion and respiration, carbon dioxide is released.

Revision

Combustion is a process of burning something to produce high temperature and release of heat.

Three things are required in proper combination before ignition and combustion can take place.

In both respiration and combustion oxygen is consumed and carbon dioxide is released.

The End