Answer the questions
Answers
Answer:
Explanation:
Combustion is the process of burning
Ignition is the electrical system that starts the car
Explanation:
answer 1
Necessary factors required for a combustion reaction to take place are :
1. A combustible or flammable substance. For example wood, petroleum, etc.
2. Ignition temperature. The fuel must be at or above this 'ignition temperature'.
3. A gas that is a supporter of combustion (oxygen). An abundant supply of such a gas is required.
answer 2
a The ignition temperature of a substance is the least temperature at which the substance starts combustion.
b Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat.
c A combustible material is a solid or liquid than can be easily ignited and burned.
d 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.
answer 3
Take a candle and fix it on a table. The candle is lighted. The candle will continue to burn due to continuously available fresh air providing the required oxygen for combustion.
Now cover the burning candle by putting an inverted gas jar over it. After a short time, the candle stops burning and gets extinguished. When the burning candle is covered with gas jar, then the candle takes away the oxygen necessary for burning from the air enclosed in the gas jar. After some time, when all the oxygen of air inside the gas jar is used up, then the burning candle gets extinguished. This proves that air is necessary for combustion of substances
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