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How does the vacuum in the flask used to store liquid nitrogen prevent heat transfer?
Wiki User
∙ 12y ago
I believe that since the vacuum is absent of matter, there is not matter to which the heat of the outside of the container can pass on its heat. In other words, if there was air inside the tude instead of a vacuum, the hotter outside of the container would make the air hot inside the walls of the container, so thus the hot air would make the inside of the container hot too. This is like a chain of heat, as the heat moves from matter to matter, bbut the vacuum limits the matter in the chaing, so less heat is passed onto the nitrogen.
Wiki User
∙ 12y ago
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Why is vacuum the best thermal insulator?
Heat travels in 3 ways. Conduction, convection and radiation. Conduction is the transfer of heat through collision of particles. Convection is the transfer of heat through the movements of particles (ie. hot particle rises, cold particle sinks). Vacuum is made up of nothing (when there is no particle, it is vacuum), and so, it is unable to transfer heat through conduction and convection at all, making it the best thermal insulator
What are the advantages of owning a central vacuum system versus a regular moveable vacuum?
Central vacuums allow for easier cleaning because it is a system installed in the house and you do not have to take it to every room. It seems this method could also save time and prevent dust from blowing back out of the vacuum like it does with a regular vacuum.
What type of energy transfer that can occur in empty space is?
Electromagnetic energy can propogate through a vacuum, so energy transfer can occur in the form of light, heat, x rays, gamma rays, gamma rays etc.
What is the purpose of a flask?
A flask is essentially a bottle. * In a labs, glass flasks (Erlenmeyer, Florence) are used for mixing heating and storing solutions. Sometimes they are graduated to show the volume of material that they contain.* Vacuum flasks are more robist, ususally with a side arm to remove gases * Insulated flasks keep things cold like liquid nitrogen
Which transfer of energy occurs mainly through the process of convection?
Energy transfer by convection is primarily restricted to fluids. One of the significant modes of heat transfer is convective heat transfer.
How big is a 2 liter liquid nitrogen container?
About twice the size of a 2 liter soda bottle. Liquid nitrogen is extremely cold- the container must be vacuum insulated, or the liquid nitrogen quickly turn to gas.
Where is the liquid air stored?
In cryogenic laboratories in presence of liquid nitrogen as a coolant. ---------------------------------------- Or perhaps in a vacuum-insulated container caled a "Dewar".
What forms of energy transfer does the vacuum prevent?
Sound, as this is a compression wave through a fluid (liquid or gas) or solid material. The electromagnetic spectrum finds a vacuum no trouble at all. cw: Vacuums prevent convection and conduction but do not prevent radiation.
Does radiation require a heated liquid to transfer energy?
No. radiant energy (including heat) can pass though a vacuum.
Is a vacuum a good insulator?
Yes, vacuums prevent 2 of the 3 main sources of heat transfer; convection and conduction. Heat can still travel accross a vacuum by radiation though.
Where is the vacuum switch on the front axle located?
On a Dodge truck, the vacuum switch is on the transfer case.On a Dodge truck, the vacuum switch is on the transfer case.
What is a VIE tank?
VIE means Vacuum Insulated Evaporator tank. It used to hold Liquid nitrogen, oxygen, carbon dioxide and other gases in their liquid form. The tank is constructed in a way that it has space (vacuum) between the outside surface and the main container to act as insulation.
How much vacuum is created by centrifugal pump during empty out the tank?
If we install centrifugal pump to transfer liquid from tank,after empty out the tank pump is continiously running,then how much vacuum is created in tank?
How is nitrogen used today?
Nitrogen in various forms is used as a farm fertilizer, where it potentiates plant growth. Liquid Nitrogen has wide uses from medicine, to flash freezing of material, to use as a coolant in vacuum pumps. Nitric Acid and Ammonia are important base chemicals in industry.
What are latest techniques used to prevent rancidity?
1.By adding anti-oxidants. 2.Vacuum packing. 3.Flushing by nitrogen. 4.Refrigeration of the food-stuff.
Why does the hot tea in a Thermos flask remain hot for a long time?
The Thermos (vacuum) flask has a double skinned glass cylinder inside. Between the two walls of the glass cylinder is a vacuum. The glass cylinder is also silvered on all inner and outer surfaces. Both the vacuum and the silvering help to prevent the rapid cooling of a hot liquid, or the warming of a cold liquid. The vacuum inhibits heat transfer by conduction. The silvering reflects the heat and inhibits the heat escaping from the flask. Thermos (often used for a vacuum flask) is a trade-name.Eventually, as anyone who uses a vacuum flask, the once hot drink will have become cool by the end of the day.
How does a vacuum bottle keep food hot or cold?
The main idea is to reduce the heat transfer out of the vacuum bottle, or into it. A vacuum greatly reduces the transfer of heat by conduction and convection, while the mirror reduces heat transfer by radiation.
