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Craft candle - the principle of chemical burning and melting of candles

2019-06-13
Craft candle - candle chemical burning
[Chemical properties] paraffin + (igniting cotton core), generating carbon dioxide and water
Chemical expression paraffin + O2 → (ignition) CO2+H2O
Chemical equation 2C8H18 +25O2 = 16CO2 +18H2O
Because the composition of paraffin is complicated, there is no uniform statement, and it is not necessary to have an oxygen atom in its reaction formula.
Simple proof experiment:
Light the candle and cover a cold, dry beaker over the candle
Craft candle - the principle of candle melting
From a macroscopic point of view, any substance has a melting point, that is, any substance that is heated to a certain temperature will melt and vaporize.
From a molecular point of view, heating can exacerbate molecular motion, so that the range of motion becomes larger, causing the gap between molecules and molecules to become larger, which in turn makes the solid slowly become liquid.
Here again, the classification and nature of solid liquid gases is mainly the change in molecular spacing.
For example, if the paper is heated and burned because of oxygen, you will isolate the oxygen, and you will find that the paper will be charred, that is, many things become gas. Carbon itself also has a melting point, but the temperature is relatively high.
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