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What is sublimation. How can we use it as a method of separation?
Sublimation is the process where a solid turns into a gas without passing through the liquid state. In separation, sublimation can be used by heating a mixture of substances where one sublimes while the others do not, allowing the separated substance to be collected as a gas and then re-condensed back into a solid.
By which process can you separate a mixture of naphthalene and chalk powder?
Sublimation can be used to separate naphthalene from chalk powder. Naphthalene sublimes at room temperature, while chalk powder does not, allowing for the separation based on this difference in physical properties.
What is sublimation used for?
sublimation is a process in which a solid is directly converted to its vapour phase without facing liquid phase.
What laboratory equipment of sublimation?
Sublimation apparatus is a piece of laboratory glassware used in the technique of sublimation usually used by chemists to purifycompounds. Typically a solid is placed in a vessel which is then heated under vacuum. Under this reduced pressure the solid volatilizes and condenses as a purified compound on a cooled surface, leaving the non-volatile residue impurities behind. This cooled surface often take the form of a cold finger. Once heating ceases and the vacuum is released, the sublimed compound can be collected from the cooled surface.
Does sublimation also mean turning from a gas straight to a solid?
The word 'sublimation' can be used two different ways in relation to gas/solid phase changes.1- Sublimation is the direct conversion of a solid to gas.The reverse process, gas to solid, is referred to as deposition.2- However, the term 'sublimation' is also used for a process for purifying a solid by heating it in an apparatus to make it turn into a gas (sublimation) and then cooling the gas back to a solid on a special cold surface (deposition). The impurities are left behind and the purified solid is gathered from the collecting area.The whole process is referred to as 'subliming' or 'sublimation', with the 'deposition' part just accepted as part of the process. This technique dates back to the alchemists.So sublimation can mean:-the change of a solid to gas or-a purifying process that features both sublimation and deposition.The term 'sublimation' is not used to mean a gas to solid change all by itself.
Why do some sources say a direct change of a gas to a solid is called sublimation instead of deposition?
Some sources are confusing because they are not up to date on the use of the word sublimation.The word sublimation is used two ways in relation to gas/solid phase changes:1- Sublimation is the direct conversion of a solid to gas.The reverse, the direct conversion of gas to solidnowadays is referred to as deposition, or sometimes as desublimation.2- However, the term 'sublimation' has long been used for a process for purifying a solid by heating it in an apparatus to make it turn into a gas (sublimation) and then cooling the gas which forms a solid deposit on a special cold surface (deposition). The impurities are left behind and the purified solid is gathered from the collecting area.The whole process has always been referred to as 'subliming' or 'sublimation', with the 'depositing' part just accepted as part of the process. This technique dates back to the days of the alchemists.So sublimation can mean:-the change of a solid to gas or-a purifying process that uses both sublimation and deposition.In modern usage, the term 'sublimation' is not used to mean a gas to solid change, since it is completely inappropriate and unscientific for two opposite actions to share the same name.
What is the term for the process of a solid such as dry ice going directly from a solid to a gas?
The transition of a substance directly from the solid state to gas (such as dry ice to gas) is called "sublimation".
What do gas masks have to do with the separation process?
Separation of what? If it is the separation of East/West Germany then it is because gas masks were used in Gas Warfare, which was used in WWI and WWII.
What is use of sublimation process of chemistry?
Sublimation is the act of turning an molecule from its gaseous state directly to its solid state. A commonly used example is the sublimation of carbon dioxide gas (CO2) into 'dry ice'. In the sublimation process, desiccation, or the removal of water, also occurs. (Hence the nickname 'dry' in dry ice) Although food products are not made from the process of sublimation, foods can be shipped with sublimed products (e.g. dry ice) in order to allow longer periods between packaging foods and cooking them.
What is the importance of sublimation?
Sublimation can be important during the recovery of compounds that are suspended or dissolved in a fluid or a solid such as dry ice. Sublimation is the transition of a substance from a solid to a gas without passing through the liquid phase.
What is the separation process used to purify water called?
Purification
Which process is used in the separation of solid and liquid mixture?
filtration
