I am a glassblower, and I would like to trap smoke in a glass bubble, my hope is to create an infinitely lingering smoke inside. Smoke is made up of particles, so eventually they will settle.
When they settle, they will probably stick to the surface of the glass and become impossible to stir up into smoke again. You might be able to do this with a vapor. Because vapors are in the gas phase, they will not settle unless chilled. Unfortunately, a vapor will dissipate over time, resulting in a consistent color inside the bubble and not the "smokey" appearance that I assume you want. There might be a way to use two gasses that won't mix, but even if that worked they would likely cause health problems if the bubble cracked open.
Any mixture of gases or smoke particles suspended in air becomes a uniform mix in minutes. So whatever sample you trap in a glass bubble will be featureless in probably less than a minute. It will be indistinguishable from a uniform stain of the glass itself.
As Wutaz writes, smoke particles will likely start sticking to the surface. At best that will result in the appearance of frosted glass, chances are the particles sticking to each other will look like deposited soot. Iodine vapor has a strong color. Iodine compounds used as antiseptic are yellowish, but the vapor of pure Iodine is Magenta in color.
But again, the mix of Iodine vapor and air will become a uniform mix in minutes, if not faster. Also, you can't contain the toxic Iodine vapor in the furnace. It's clearly too dangerous to try something like that in a shop for handcrafted glasswork. Your bubble will quickly attain thermal equilibrium. To obtain structures such as smoke in thermal equilibrium, you need intermolecular forces.
However, a characteristic property of gases is that thermal motion dominates intermolecular forces — and thus destroys the structures very quickly. Therefore, you cannot have long-lasting smoke-like structures in gases in your bubble — unless you ensure that it is not in thermal equilibrium, e. In most respects, your glass bubble is an isolated system.
Mixing different species of molecules. This is simply because there are much more mixed states than ordered states. This is the maximisation of disorder with which entropy is often explained in popular science. If you increase the temperature of the system, mixing will become more dominant this is due to the thermal energy overcoming the ordering forces.
In particular, in a gas, thermal mixing dominates intermolecular forces. This is what distinguishes a gas from a liquid: If intermolecular forces dominated, condensation would happen and we would have a liquid or solid. Thus the only way to obtain an ordered state in thermal equilibrium in a gas is by external force fields. I cannot find any sources on this, but IIRC, gravity is not strong enough to stratify any pair of gases at room temperature on the scales we are talking about.
Now, anything resembling smoke is obviously not mixed and predominantly a gas. It is also not structured by an external force field which would cause layers or similar.
Therefore it cannot be the thermal equilibrium. From another point of view, all processes causing smoke are clearly far from thermodynamic equilibrium. For example, the process of burning a candle is based on restoring a chemical equilibrium which supplies the energy and comes with considerable inhomogeneities in temperature.
Cycling between cooling and heating. For example, you could have a liquid or solid in your bubble that evaporates when heated, which would cause smoke to form. Heating a part of the bubble and cooling another part. For example, you could heat the bottom of your bubble and have the rest cool down by the surrounding room. However, unless you carefully tune this, you will likely only see a foggy bubble.
Think of supplying just the right amount of heat to a closed pot of water. Shaking the bubble. However, this can only cause layered structures to homogenise and does not form structures. However, the temperatures required for breaking those bindings will also melt your glass otherwise they would been broken in production , so we can disregard them. Also, these are usually strongly exothermic one-way processes.
If not, you can fill the glass bubble with a clear, viscous fluid like corn syrup or glycerin, and then with a straw, blow some food coloring into the middle of the fluid. Then seal the glass bubble. Heat it slightly so the food coloring diffuses slightly into the shape of smoke.
Then let it cool and put in a place where it won't get disturbed. By 7macs Follow. More by the author:. For this Instructable you will need a Q card a lighter a jar with a lid. First fold the card in half so you have a crease, then unfold. Now fold both sides into the center. Fold that in half and then this step is done! Take the lighter and light the end of the folded Q card on fire. Now lightly blow the fire out so it smokes. The smoke will last for about 10 to 15 mins.
Smoke wants to rise so if you block its exit it has nowhere to go. Its as simple as that. Hope you enjoyed! Participated in the Fire Challenge View Contest. Did you make this project? Share it with us! I Made It! Chameleon Mask by hugheswho in Halloween. Genaille's Rods by Wingletang in Education. YungC6 Question 2 years ago.
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