The candle burned shorter (where did it go?).
The candle burned shorter (where did it go?)
When a candle burns, a chemical reaction takes place. The products of n-docane and stearic acid combustion are carbon dioxide and water. Since the candle burns at a high temperature, the water stays in the air in the form of steam, so it becomes shorter.
The main raw material of candles is paraffin (C25H52), which is prepared from paraffin fractions of petroleum by cold pressing or solvent dewaxing. It is a mixture of several alkanes, mainly n-docane (C22H46) and n-docane (C28H58), containing about 85% carbon and 14% hydrogen.
The additives include white oil, stearic acid, polyethylene, essence, etc. The stearic acid (C17H35COOH) is mainly used to improve the softness, depending on the type of candle produced.
It is easy to melt and less dense than water.When heated, it melts into a liquid state. It is colorless, transparent and slightly volatile. The smell of paraffin can be heard.When it is cold, it solidifies into a white solid shape with a slight special smell.So the candle burning will get shorter and will turn into carbon dioxide and water running into the air.
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