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An essential oil is a concentrated, hydrophobic liquid containing volatile compounds from plants or artificially manufactured to replicate such compounds.http://wiki.answers.com/wiki/Plant Essential oils are also known as simply as the "oil of" the plant from which they were extracted, such as oil of clove. An "essential oil" is "essential" in the sense that it carries a distinctive scent, or essence, of the plant. Essential oils do not as a group need to have any specific chemical properties in common, beyond conveying characteristic fragrances.
Essential oils are generally extracted by distillation although they may also be recovered through expression or solvent extraction.
Since they are fairly volatile, they usually have a lower freezing point than water. As such, they can be effectively dried by treating with liquid nitrogen and straining out the frozen water.
It can also be used in a reflux with the oil where the heavier materials including solids and water will remain at the bottom and the volatile oils and nitrogen vapor come out the top. Since nitrogen is far more volatile than the essential oils, it is fairly easy to flash the vapor to condense the oils and draw off the remaining nitrogen as a (very cold) nearly pure gas.
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Is liquid nitrogen a cryogenic liquid?
Yes, because it is extremely cold. Cryogenics is the science of very, very cold substances, and dry ice and liquid nitrogen are one of the main two substances in that genre.
What substance is use to deep freeze?
Liquid Nitrogen or Dry Ice (Carbon Dioxide)
Can you freeze water using dry ice?
Dry ice can be turned into a liquid but there is a very slim range of temperatures that it can exist at.
How can you get liquid oxygen using liquid nitrogen?
Liquid nitrogen is colder than liquid oxygen. You use the liquid nitrogen to chill the oxygen in the air and liquid oxygen will form. Liquid water and dry Ice (CO2) should also form due to their presence as well, but not in large quantity. WARNING!! High concentrations of oxygen should be considered dangerous. When exposed to a small ignition source, it can cause flammable materials to combust much like an explosion, and will cause normally non flammable materials to burn readily. Human flesh burns better than wood after being exposed to 100% oxygen for a period of time. Please be careful.
Which is colder dry ice or regular ice with salt?
Dry ice vapor is carbon dioxide. The only argument that might be made is that the vapor, which is very cold, is more dense because of its lower temperature than "regular" or room temperature carbon dioxide.Carbon dioxide is a colorless and odorless gas, by the way. What you actually see when dry ice, the solid form of carbon dioxide changes state from a solid to a gas (which is called sublimation) is water vapor in the air condensing into tiny droplets because of the intense cold near the dry ice.
Is liquid nitrogen an oxidizer?
dry ice −56.4 °C and liquid nitrogen is −196 °C
Does liquid nitrogen Sublimate?
Liquid nitrogen is not dry ice. Dry ice is a solid form of carbon dioxide and liquid nitrogen is pure nitrogen in liquid form. Dry ice is frozen nitrogen. Liquid nitrogen is also frozen nitrogen, but is also pressurized. That's why it's in large, steel boxes. Chur.
Can nitrogen gas be used to make dry ice?
Nitrogen in its liquid state is a cryogenic gas aka cryogen.
Is liquid nitrogen a cryogenic liquid?
Yes, because it is extremely cold. Cryogenics is the science of very, very cold substances, and dry ice and liquid nitrogen are one of the main two substances in that genre.
What substance is use to deep freeze?
Liquid Nitrogen or Dry Ice (Carbon Dioxide)
What good is nitrogen in dry air?
Nitrogen is essential for plant growth. Also, human brains cannot handle 100%, we go lightheaded and serene.
Can you freeze water using dry ice?
Dry ice can be turned into a liquid but there is a very slim range of temperatures that it can exist at.
What is another name poor man's liquid nitrogen refers to?
I've never actually heard this term used. I suppose it might mean either dry ice or a mixture of dry ice and acetone (or dry ice and diethyl ether), dry ice being somewhat easier for most people to obtain than liquid nitrogen.
If you do not have cold place is there any chemical that helps ice not to melt that fast?
Liquid nitrogen or dry ice perhaps?
How do you freeze a hamburger patty without putting it in a freezer?
You could surround it with dry ice or drop it in liquid nitrogen.
Would dry ice function the same way as liquid nitrogen in the balloon experiment?
No, because dry ice is a solid and you cannot place a solid inside a solid. If it was liquid carbon dioxide (as opposed to dry ice, solid carbon dioxide) then it would behave similarly.
How can you get liquid oxygen using liquid nitrogen?
Liquid nitrogen is colder than liquid oxygen. You use the liquid nitrogen to chill the oxygen in the air and liquid oxygen will form. Liquid water and dry Ice (CO2) should also form due to their presence as well, but not in large quantity. WARNING!! High concentrations of oxygen should be considered dangerous. When exposed to a small ignition source, it can cause flammable materials to combust much like an explosion, and will cause normally non flammable materials to burn readily. Human flesh burns better than wood after being exposed to 100% oxygen for a period of time. Please be careful.
