1.What is Combustion?
2.What is Combustible substance?
3.What things we would need to start a fire?
4.What is ignition temprature?
5.What do you mean by inflammable substances?
6.How do we control fire?
7.Explain the three types of combustion?
8.What is Flame?
9.Explain the different zones of a candle flame?
10.What is a Fuel?
11.what do you mean by califoric value? In what unit it is expressed?
Answers
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Combustion is the process of burning something.
Answered by
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combustion is a chemical process in which a substance burns or reacts with o2 n produces heat n light . it is an irrereversible change.
The substance which burns with the help of o2 is combustible substances. for e.g. coal , petroleum .
The minimum temperature at which a substance starts burning is called ignition temperature .
If a substance had low ignition temperature . it will easily start burning . e.g. phosphorous , kerosene . and these substances are called inflamable substances
By using water we can cut off fire on wood , paper etc
The 3 types of combustion are Rapid combustion , spontaneous combustion n explosion
combustion that occurs in a short span of time n produces a large amount of heat n light is rapid
combustion that occurs spontaneously on its own without any external heat is spontaneous combustion
combustion that suddenly occurs with a loud sound n produces large amount of heat is explosion
Flame is a place where burning of gases takes place
Blue zone
hottest part
outermost zone
complete combustion takes place
Blue flame with little light
yellow zone
moderately hot
middle zone
incomplete combustion
bright yellow flame n more light
black zone
innermost zone
least hot part
no combustion
black zone appears black
Fuel is a combustible substance that burns to produce heat for domestic or industrial use .
The substance which burns with the help of o2 is combustible substances. for e.g. coal , petroleum .
The minimum temperature at which a substance starts burning is called ignition temperature .
If a substance had low ignition temperature . it will easily start burning . e.g. phosphorous , kerosene . and these substances are called inflamable substances
By using water we can cut off fire on wood , paper etc
The 3 types of combustion are Rapid combustion , spontaneous combustion n explosion
combustion that occurs in a short span of time n produces a large amount of heat n light is rapid
combustion that occurs spontaneously on its own without any external heat is spontaneous combustion
combustion that suddenly occurs with a loud sound n produces large amount of heat is explosion
Flame is a place where burning of gases takes place
Blue zone
hottest part
outermost zone
complete combustion takes place
Blue flame with little light
yellow zone
moderately hot
middle zone
incomplete combustion
bright yellow flame n more light
black zone
innermost zone
least hot part
no combustion
black zone appears black
Fuel is a combustible substance that burns to produce heat for domestic or industrial use .
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