Do all fuels catch fire at the same time?why?
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The reason that heat is required to start a fire is because we need to supply enough energy to get these small molecules into the air around the wood. Once these molecules are in the air, they need to be ignited. A flame or a spark does the trick if the gastemperature is above the flash-ignition temperature..
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It would not catch the fire so we used to blow the air from a pipe so that it could catch fire instantly. But at the same time, we use a blow of air to extinguish the flame of a candle.
Oxygen is necessary for combustion.
Blowing out a candle makes the candle goes out. Because in candle the flame is due to burning of vapoutized wax. When we blow the candle the vapourized wax is removed from the heat source and the candle flame goes out.
Where as in the case of wood blowing on glowing wood or charcoal will make it burn faster. When you blow the fuel cannot move away. Here while blowing your adding air to the fuel so it catches fire easily.
Oxygen is necessary for combustion.
Blowing out a candle makes the candle goes out. Because in candle the flame is due to burning of vapoutized wax. When we blow the candle the vapourized wax is removed from the heat source and the candle flame goes out.
Where as in the case of wood blowing on glowing wood or charcoal will make it burn faster. When you blow the fuel cannot move away. Here while blowing your adding air to the fuel so it catches fire easily.
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