What if the candle core is gone but there is a lot of wax left? How can I continue to use it? 1. The candle wick is gone, but there is still a lot of wax. How can I continue to use it?
Replace a thick cotton thread with melted candle oil, and it will be the same as a wick when it dries.
Second, the nature of the composition:
1. Candle is a daily lighting tool, mainly made of paraffin.
2. Paraffin wax is made from the waxy fraction of petroleum by cold pressing or solvent dewaxing, and it is a mixture of several higher alkanes, mainly n-docosane (C22H46) and n-octacosane (C28H58), containing about 85% carbon and 0/4% hydrogen/kloc-. The newly added auxiliary materials include white oil, stearic acid, polyethylene, essence, etc. Among them, stearic acid (C 17H35COOH) is mainly used to improve the softness, and the specific addition amount depends on what kind of candles are produced. Easy to melt, less dense than water, insoluble in water. When heated, it melts into liquid, colorless and transparent, slightly volatile when heated, and can smell the unique smell of paraffin. Solidified into a white solid when cooled, with a slight smell.
Second, the principle:
1, we see that candle burning is not the burning of paraffin solid, but the ignition device ignites the cotton core, and the released heat melts the paraffin solid, which is vaporized again to generate paraffin vapor, which is flammable.
When the candle is lit, the initial flame is very small and gradually becomes larger. The flame is divided into three layers (outer flame, inner flame and flame center). The center of the flame is mainly candle vapor with the lowest temperature. The paraffin in the internal flame is not fully burned, and the temperature is higher than the flame center. Because there are some carbon particles, the outer flame is in full contact with air, the flame is the brightest, the combustion is full and the temperature is the highest. Therefore, when a matchstick is quickly laid flat in the flame and taken out after about 1 second, the part of the matchstick that contacts the external flame turns black first.
You can see a wisp of white smoke when the candle blows out. Igniting this wisp of white smoke with a burning match can rekindle the candle, so it can be proved that white smoke is a solid fine particle produced by the freezing of paraffin vapor.
When the candle burns, the products of combustion are carbon dioxide and water. Chemical expression: C25H52+O2→ (ignite) CO2+H2O. The combustion phenomenon in oxygen cylinder is that the flame is bright and emits white light, releasing heat, and water mist appears on the bottle wall.
5. Simple proof experiment: light the candle, cover it with a cold and dry beaker for 5 minutes, and then turn the beaker quickly. It was found that the inner wall of the beaker became blurred and water droplets were produced, indicating that the candle burned to produce water.
6. Add a small amount of clarified limewater into the beaker to oscillate, and observe that the clarified limewater becomes turbid, indicating that the candle burns to produce carbon dioxide.
What if IKEA candle cups are sold out? It's disposable. You can buy it locally. You can buy it online. If you want to save money, you can use an empty candle cup or make it yourself.
Buy a candle and light it. Drop the wax into the candle cup and wipe it with a cotton swab.
What is the candle after it burns? Ash and waste gas
Why can't a candle burn without a wick? It's not that there is no fire without the core. Because no matter what kind of combustion, it must reach the ignition point of the substance, and it will not burn until it reaches the ignition point.
You can do an experiment if you don't believe me. Wax in an aluminum box and then heat it on the fire. When it reaches the ignition point, the wax will spontaneously ignite and burn without a core.
Candles with wicks are easy to light, because the wick reaches the ignition point when it is lit.
The candle core was lit. Is the remaining candle oil still on? It will burn. Candle oil has a low ignition point. When I was a child, I played with bottle caps to breathe fire. I just put candle oil in the bottle cap, light it and drop a drop of water. Fire can jump one or two meters at a time. Danger.
Can a candle burn without a wick? Can paraffin burn? What's the use of wick? Three elements of combustion: combustible, combustion improver and ignition point.
As combustible materials, candles and paraffin wax without wick can be burned, provided that the three elements of combustion are met.
It should be noted that the ignition point of candles is much higher than the melting point of paraffin. Paraffin gradually softens when the temperature rises, then becomes liquid, and then the temperature continues to rise, reaching the ignition point of paraffin, and the candle begins to burn.
Function of wick: When the wick is lit, the wick burns and releases heat, so that the candles around the wick melt into liquid, and then wax oil rises along the wick according to capillary phenomenon and starts to burn, and then burns and releases heat, so as to continue to melt the candles around the wick into liquid. This process continues and the candle continues to burn; Candles can burn without wick, but they need to be completely melted and reach the ignition point before they can start to burn. When burning, you need a container to hold wax oil, and the burning effect is the same as that of alcohol in a bowl.
What if the wick of a candle is wet and can't be lit? This is not a big problem. If it is lit for a long time, it will naturally light up.
Is the wax water formed after the candle burns equal to the original candle? Usually candles are made of paraffin. Paraffin wax is prepared from waxy fractions of petroleum or shale oil by cold pressing or solvent dewaxing. Paraffin is a mixture of several higher alkanes, mainly n-docosane (C22H46) and n-octacosane (C28H58), containing about 85% carbon and 0/4% hydrogen/kloc-. Stearic acid (C 17H35COOH) is often added to candles to improve the softening point.
Candles burn in oxygen, that is, paraffin and stearic acid burn in oxygen. The products of their combustion are carbon dioxide and water, so the liquid flowing out is only a part of the unburned original candle.