Combustion & Flame
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Combustion & Flame. By Vishnu M Nair. Index. Basic needs How to extinguish Fire The Ignition temperature Inflammable combustion Rapid & Spontaneous Combustion Zones Of Candle Flame Explosion Fuel Fuel Efficiency Global Warming Acid Rain. Basic Needs.

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Combustion & Flame

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Combustion flame

Combustion & Flame

By

Vishnu M Nair


Index

Index

Basic needs

How to extinguish Fire

The Ignition temperature

Inflammable combustion

Rapid & Spontaneous Combustion

Zones Of Candle Flame

Explosion

Fuel

Fuel Efficiency

Global Warming

Acid Rain


Basic needs

Basic Needs


Basic needs1

Basic Needs

The major conditions for a fire to burn is

  • The presence of Oxygen

  • The presence of fuel

  • The temperature to reach flash point


Basics of combustion and flame

Basics of Combustion and Flame

Combustion – A chemical process in which a substance reacts with oxygen to give off heat is called combustion.


Combustion flame

We now understand that fire be seen with the help of the above

Q1. What will you do if you see a uncontrolled fire?


How to extinguish fire

How to extinguish fire?

The answer to that question is so simple.

Fire can only burn with presence of oxygen and fuel and if temperature is above flash point.

So to extinguish fire remove away any of these


Combustion flame

For Example

  • By denying the access of oxygen

    Example: If fire is on a human body we should cover him tightly with a blanket like that on the picture below


Combustion flame

2. By taking away the fuel

3. By decreasing the temperature below flash point

This can be done by poring water over the fire

Q. What will you do if the fire is caused by an electric short circuit


Combustion flame

In such a case DO NOT TRY TO EXTINGUISH IT WITH WATER.

As water may come in contact with electric shock which could lead to serious injuries or even DEATH


The ignition temperature

The Ignition Temperature

The lowest temperature at which a substance catches fire is called its Ignition Temperature

It is essential for a substance to reach its ignition temperature to burn


Given here are some fuels and its ignition temperature

Given here are some fuels and its ignition temperature


Inflammable substance

Inflammable substance

The Substances which have very low ignition temperature and can easily catch fire with a flame are called inflammable substances

Some examples are: Petrol, Alcohol, Liquid Petroleum Gas


Rapid combustion and spontaneous combustion

Rapid Combustion and Spontaneous Combustion


Rapid combustion and spontaneous combustion1

Rapid Combustion and Spontaneous Combustion

Rapid Combustion: Gas burns rapidly and produces heat and light. Such combustion is known as rapid combustion.


Rapid combustion and spontaneous combustion2

Rapid Combustion and Spontaneous Combustion

Spontaneous Combustion: The type of combustion in which a material suddenly bursts into flames, without the application of any apparent cause is called Spontaneous Combustion


Combustion flame

Zones of Candle Flame


Explosion

Explosion

When a cracker is ignited, a sudden reaction takes place with the evolution of heat, light and sound. A large amount of gas formed in the reaction is liberated. Such a reaction is called explosion.


Combustion flame

Fuel

The substance that undergoes combustion is said to be combustible or FUEL


Know more on fuels

Know more on fuels

A Good Fuel – A good fuel is:-

  • Readily Available

  • Cheap

  • Burns easily in air

  • And does not leave any undesirable substance behind.


Fuel efficiency

Fuel Efficiency

The amount of heat produced on complete combustion of 1 kg fuel is called its calorific value. The calorific value is expressed in a unit called kilojoules per kg (kj/kg).


Burning of fuels leads to harmful products

Burning of fuels leads to harmful products


Global warming

Global Warming

Combustion of most fuels releases carbon dioxide in environment. Increased carbon dioxide in air is believed to cause global warming


A bear that lost his home because of ice melting

A bear that lost his home because of ice melting


Acid rain

Acid Rain

Burning of coal and diesels releases sulphur dioxide gas. Oxides of sulphur and nitrogen dissolve in rain water and forms acids.

Such a rain is called acid rain.


Acid rain1

Acid rain


Combustion flame

THE END


Combustion flame

Done By

Vishnu

Hope you liked it ?


Combustion flame

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