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At what temperature does diamond sublime?
Neither graphite nor diamond melt when heated - at a temperature of about 4800 °C, they sublime into gases. It takes a lot of energy to make them sublime as many strong covalent bonds need to be broken.
Do all ammonium compounds sublime?
No, not all ammonium compounds sublime. The ability of an ammonium compound to sublime depends on its specific chemical properties, such as its volatility and stability under heating. Some ammonium compounds do sublime, like ammonium chloride, but others may decompose or melt before sublimation can occur.
How does the energy required to sublime a substance compare to the energy required to melt the substance?
The energy required to sublime (solid to gas) a substance at 1 ATM pressure is greater than the energy required to melt (solid to liquid) a substance. When you compare the energies in varying pressures, however, this trend is not always the case. If you Google any 'general phase diagram', you can see that under the triple point, when all phases are in equilibrium, have solid and gas meeting under a certain pressure. In a vacuum, it would require less energy to sublime than to melt.
Does common salt sublime?
No, common salt does not sublime. Sublimation refers to the process by which a solid directly transforms into a gas without passing through the liquid phase. Salt will instead melt when heated, before eventually vaporizing.
Will sugar sublime?
No. Sugar is a solid. When heated, it will burn, but not sublime. (To sublime is to go from the solid state to the gaseous state with no liquid state in between. The most common thing that will sublime is solid carbon dioxide, which we know as "dry ice". It's a solid below about -109F, and sublimes into the gaseous state above that. Carbon dioxide has no liquid state at atmospheric pressure; it is only liquid below 0 degrees F at pressures above 60PSI.)
As oxygen heated will solid Oxygen sublime or melt under a pressure of 1 ATM?
Under a pressure of 1 atm, solid oxygen will sublime when heated. This is because the triple point of oxygen is at a pressure lower than 1 atm, so heating solid oxygen at 1 atm will cause it to bypass the liquid phase and transition directly to a gas.
Why does graphite sublime?
Graphite does not sublime or melt under normal room temperature. However; it does sublime if the temperature reaches 3652-3697℃.
Why does graphite?
Graphite does not sublime or melt under normal room temperature. However; it does sublime if the temperature reaches 3652-3697℃.
At what temperature does diamond sublime?
Neither graphite nor diamond melt when heated - at a temperature of about 4800 °C, they sublime into gases. It takes a lot of energy to make them sublime as many strong covalent bonds need to be broken.
Do all ammonium compounds sublime?
No, not all ammonium compounds sublime. The ability of an ammonium compound to sublime depends on its specific chemical properties, such as its volatility and stability under heating. Some ammonium compounds do sublime, like ammonium chloride, but others may decompose or melt before sublimation can occur.
Does sodium chloride sublime or melt?
No, Sodium Chloride is NaCl, which is salt.
Will cans crush under the pressure of heat?
no they will melt if it is hot enough
Why don't rocks in earth's lower crust upper crust and mantle melt?
The rocks don't melt because they are under tremendous pressure. High pressure raises the temperature needed to melt something.
Why a substance would sublime rather than melt into a liquid What types of solids generally sublime?
http://en.wikipedia.org/wiki/File:Phase-diag2.svg
How does the energy required to sublime a substance compare to the energy required to melt the substance?
The energy required to sublime (solid to gas) a substance at 1 ATM pressure is greater than the energy required to melt (solid to liquid) a substance. When you compare the energies in varying pressures, however, this trend is not always the case. If you Google any 'general phase diagram', you can see that under the triple point, when all phases are in equilibrium, have solid and gas meeting under a certain pressure. In a vacuum, it would require less energy to sublime than to melt.
When does dry ice melt?
Dry ice only melts when it is under pressure of 5.1 atmospheres.
What can melt rocks without changing temperature when their confining pressure?
The process of partial melting can occur in rocks under high confining pressure, where the minerals in the rock start to melt without the overall temperature changing. This happens because the pressure lowers the melting point of the minerals. The supercritical fluids in Earth's mantle can also cause rocks to melt without a change in temperature under the high pressure conditions.
