where does the wax go from a candle when it burns?
442252
Good question.  The flame converts wax into chemicals that evaporate into the air. Here's how it works:\n\nThe heat from the flame melts the wax into a liquid.  The liquid is drawn up the wick by a process known as capillary action.  The liquid wax is heated by the flame until it turns into a gas.  The gaseous wax combines with the oxygen in the air.  This chemical reaction produces many chemicals, but since wax is a hydrocarbon, (it contains mostly hydrogen and carbon, just like other flamable chemicals such as gasoline and wood) the byproducts are mostly water (a combination of hydrogen and oxygen) and carbon dioxide (a combination of carbon and oxygen).  In the heat of the flame, both water and carbon dioxide are gasses and float away into the air.  That is where the wax goes when the candle burns.
1087539
When things "burn" the general reaction is as follows:\nCarbon + O2 --> CO2 + H2O\nThe CO2 and H2O are emitted as gasses, which means that the ash is everything that is left.  The composition of the ash depends on the starting material, and the black soot is most likely reduced carbon (such as graphite).
58135
Get a bottle cap. Put candle wax in it. Burn the bottom of the cap until wax melts. Wax will start to set on fire after while.\n\nPut a drop of water on it.\n\nBurn yourself.
1003680
The lamp consists of an illuminating bulb, and a glass bottle containing a transparent liquid, translucent wax, and a metallic wire coil. The glass bottle sits on top of the bulb, which heats its contents. The metallic wire coil is hidden in the base of the lamp, which the glass bottle is sitting on.\n\nThe wax is slightly denser than the liquid at room temperature, and slightly less dense than the liquid under marginally warmer conditions. This happens because the wax expands more than the liquid when heated.\n\nThe light bulb heats the container at the bottom, and due to heat exchange with the atmosphere, the container eventually dissipates the introduced heat. This method of heat transfer is called convection.\n\nWax at the bottom heats until it melts, and eventually becomes less dense than the liquid above it. At this time, a portion of the wax rises towards the top of the container. Near the top, away from the heat source, the wax cools, contracts, and as its density increases it begins to fall through the liquid towards the bottom of the container again. The difference in temperature between the top and bottom of the globe is only a few degrees.\n\nOne mass of wax may rise as another falls. The metal coil at the bottom helps to overcome the surface tension of the individual wax droplets, causing the descending blobs to agglomerate into a single molten wax mass at the bottom of the container. The cycle of rising and falling wax droplets continues so long as the bottom of the container remains warm and the top of the container remains cool. Operating temperatures of lava lamps vary, but are normally around 60 °C (140 °F). If too low or too high a wattage bulb is used in the base, the "lava" ceases to circulate, either remaining quiescent at the bottom (too cold) or all rising to the top (too hot).\n\nChaotic behaviour makes the movement of the wax unpredictable—hence lava lamps can aid in the generation of one-time pads for cryptographic use.\n\nThe colour of the wax and the liquid often varies and can be found in many different combinations.
554441
The "burn rate" of a candle depends on the type of wax (or other material being burned, e.g., "gel candles"), the type of wick, the geometry of the candle and wick, etc.  In general, though, burn rates for typical candles are on the order of 2-8 grams of paraffin/hour.\n\nParaffin wax is composed of straight-chain hydrocarbons with the general formula CnH2n+2, where n is greater than 20.  As the size of paraffin molecules increases, the carbon content approaches the limiting value of 85.7 percent asymptotically. For the sake of argument, let's say the wax in a candle is 85% carbon by weight (the rest is hydrogen).  This corresponds to a hydrocarbon chain containing about 20 carbons.\n\nIf the wax is burned completely, the overall chemical reaction involved is:\n\n  30.5*O2 + C20H42 -> 21*H2O + 20*CO2\n\nor, for each molecule of C20H42 burned, one needs 30.5 molecules of O2 gas.  For each atom of carbon in the wax that is burned, one needs 30.5/20 = about 1.5 atoms of oxygen gas.\n\nOxygen is the only gas in air that is consumed by the reaction, and if the candle burns prefectly cleanly, the only things produced are carbon dioxide (CO2) and water.  In reality, candles don't burn perfectly, and they produce some unburned hydrocarbons, soot, and carbon monoxide.  In addition, candles commonly have additives, such as colorants and fragrances, that are released.\n\nA candle that burns at a rate of 5 grams of paraffin per hour releases about 5*0.85 = 4.25 grams of garbon/hour (85% of the total mass).  The atomic weight of carbon is 12 grams/mole, so 4.25 grams/hour = 0.354 moles C/hour.  \n\nEach mole of carbon needs 1.5 times as many moles of O2 gas, so oxygen is consumed at a rate of 0.531 moles/hour.\n\nAt room temperature and pressure, a mole of gas occupies about 22.4 liters, so the candle uses up 11.9 liters of O2/hour.  As you point out, air is only 20% oxygen, so this is the oxygen contained in 11.9/.2 = 59.5 liters of air.  \n\n59.5 liters air/hour = (approximately) 1 liter air/minute.
1156049
It burns  with more of a round shape than a flame on earth. In a gravity environment the hot gases move up and effect the shape of the flame (where the gases are combusting).\n    \nUnless the flame has air moving past it, it will soon go out, because the burnt gases stay around the flame rather than rising up.
872616
if they are in a good candle burner is one way to be safe.. The Best way to avoid candle burners from getting too hot and crack is to buy better candles . they don't put out the heat like cheaper ones do and they will prevent the candle holders from cracking.if the wick is too long , cut some off to prevent the wick from burning too high and fast. the cheaper the candle the faster it burns, and it leaves black soot inside the burners.\nBurning candles  are fine all day everyday if you are there to watch them..
8516
The heat of the flame melts the wax. The wick will transport liquid wax into the flame zone (by capillary action), where it can evaporate. The flame consists of two different zones, an oxygen-rich outer layer where carbon monoxide burns with a transparent blue flame and an oxygen-poor inner core where soot particles give off the warm orange glow of a candle flame.\n\nChemically, you have a reaction of the wax (esters of fatty acid) with the air oxygen, forming carbon dioxide and water, and depending on the quality of the wick, soot from incomplete combustion.
954186
Call the fire department.  I'm quite sure there are some strict regulations about burning candles in children occupied areas.  If nothing else, common sense would say you don't burn candles where kids can get to it.
509379
the candles do not work for removing wax\nyou probably have an ear infection which causes the earache\nyou need antibiotics
894596
A regular fire, like in a fireplace or campfire, consists of burning organic material such as wood or other plant material which is mainly made from Carbon, with hydrogen. When the wood burns, the carbon combines with oxygen. It releases a lot of energy that was stored in the chemical bonds of the wood.\n\nAs the wood burns, some of it is very hot, and other parts are not yet hot, are heating up or are being burned loose and carried away by the currents of air moving between the sticks of wood. So the fire is giving off Carbon dioxide, partially burned fractions of the wood, hot ut unburned pieces of the wood, and pieces of wood that are hardly hot at all. In some cases, there will be carbon atoms that are hot but they were in a part of the fire where all the oxygen had been used up, so those atoms may be hot but not burned. \n\nAll these various materials can be glowing with heat. Because they are all different temperatures, they have different colors.  It might be easier to see this in a candle flame than in a fire. \n\nIf you look at the candle flame you see a part where the actual combustion is taking place - that is, where there are carbon atoms actually in the process of combining with oxygen. That area might be quite hot and have no color at all. But there is probably an area above that which is yellow - that's probably unburned carbon atoms which are glowing from heat, but they are cooling off. As they cool off you see an area where they are no longer yellow. If you put a cool piece of glass or metal in that part of the flame, it will collect a coating of the unburned carbon atoms, what we call 'soot'.\n\nPeople have been looking at candles for a long time, trying to understand how the burning process works. So I think you could go all the way back to Michael Faraday in the mid 1800s for a book on candles and flames, and some updated versions on the web.
345701
you light a candle, drop it in the bottle, place a peeled egg on top, when the candle burns out the vacuum will pull the egg in
142322
How long a candle burns depends on the length, width, the content of the wax, the drafts in the room.  So if two burn the same number of days, then they probably have some other differences besides length.
160615
I really dont think the color had anything to do with it, but possible the stuff that colors the wax.\n\nI have no idea what they use to make candles have a smell to them, or what they uses as coloring, but in theory, this would be the only differnce between the candles you tested.\n\nYou might test which candle wax has a higher melting point (making it burn more slowly).  Perhaps something in the white candle wax is effecting its melting point.
1155530
hmm well ethanol is flammable anyway so you could just put some in a container and light it on fire. I don't think it would make a very good candle though. Probably wouldnt be very good to breathe in either. I think they make a kind of ethanol gel you could use too.
526210
The stuff inside is a wax that gets heat up by the bulb on the bottom of the lamp. Wax and water don’t combine so that is why it doesn’t mix. When the wax get hot enough it becomes lighter than water, as it hits the top it cools of and floats on back down.
221458
Mostly it's just hydrogen and carbon.  Parafins are polymers of hydrocarbon, much like what is in gasoline, except the chains are much, much longer.  The high molecular weight makes the wax not so volitile (ie it doesn't turn into a gas like gasoline) and the lengths makes the wax burn much more slowly.\n\nIn a regular candle, you'll have other random elements in whatever dyes or perfumes they use to make it comercially appealing, and maybe something to make them stiffer or whatever--but the wax is just hydrocarbon.