Which of the following is an example of rapid combustion?a)Candleb)Cra...
Rapid combustion is a form of combustion in which large amounts of heat and light energy are released. Candle shows rapid combustion, whereas cracker and white Phosphorous come under explosion and spontaneous combustion respectively.
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Which of the following is an example of rapid combustion?a)Candleb)Cra...
Rapid combustion is a type of combustion that occurs when a substance burns rapidly and produces a large amount of heat and light. In this process, the substance reacts with oxygen in the air and releases energy in the form of heat and light. Among the options given, the candle is an example of rapid combustion.
Candle:
A candle consists of a wick, which is usually made of cotton, surrounded by a solid substance called wax. When the wick is lit with a flame, it melts the wax near the wick. The liquid wax is drawn up the wick through capillary action and is vaporized by the heat of the flame. This vaporized wax reacts with oxygen in the air and undergoes rapid combustion.
Explanation:
- The wick of the candle acts as a fuel source, providing a continuous supply of liquid wax to be vaporized and burned.
- The heat of the flame vaporizes the liquid wax, which turns into a gas and mixes with oxygen from the air.
- The mixture of wax vapor and oxygen reacts, releasing energy in the form of heat and light.
- This process is rapid and continuous as long as the candle is burning and there is sufficient wax and oxygen supply.
- The heat produced by the flame is sufficient to keep the wax near the wick in a liquid state, ensuring a continuous supply of fuel for combustion.
- The light emitted by the flame is a result of incandescence, which is the emission of light due to the high temperature of the burning wax.
- The rapid combustion of the wax in the candle produces a steady flame, which continues until the wax is completely consumed or the flame is extinguished.
In conclusion, a candle is an example of rapid combustion because it burns rapidly, producing heat and light through the combustion of vaporized wax.