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Why melting point of diamond is higher than that of silicon carbide?
Wiki User
∙ 8y ago
Diamond is a covalent network solid, and those types of compounds have higher melting points than other types of compound.
Wiki User
∙ 8y ago
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Why is diamond a unusual non metal?
non-metals have lower density, melting and boiling point but diamond has higher density, melting and boiling point.
Why is the melting point of diamond higher than that of oxygen?
It is because of the fact that diamond has stronger covalent bond between C-C atoms and it requires large amount of energy to break the bonds.
When magma cools minerals with higher melting points will?
Minerals with higher melting points will crystallize.
Do non-metals have a high boiling point?
Not really, most have low boiling points, except for carbon, for example, which has one of the highest boiling points of any substance at 4827 ºC and Silicon boils at 2355 ºC. Iodine boils at a higher temperature than mercury.
Are melting points of molecular substances higher than those of ionic substance?
Ionic substances have higher melting points.
Why diamond has a higher melting point than silicon carbide?
The bond energy of Si -C is generally considered to be lower than that of the C-C, so a simple explanation is that diamond has a stronger bond. Both diamond and silicon carbide have a three dimensional network structure. Diamond consists of tetrahedral bonded carbon atoms whereas silicon carbide has many polymorphs (crystal structure which are temperature dependant). As you heat silicon carbide up the crystal structure changes. Silicon carbide does not melt "congruently" to give a liquid of the same composition, it decomposes at around 2700 0C .
Why silicon carbide is use in cutting tools?
Silicon carbide and silicon carbide ceramics are black, high-strength materials with higher hardness and better thermal shock resistance than alumina. They have superior properties for power devices and are predicted to revolutionize the power electronics industry. These hard ceramics consist of grains of silicon carbide which can be bonded together by sintering.
What substance has higher melting point silicon dioxide or methanol?
Silicon dioxide. Silicon dioxide silica is the mineral quartz and is a giant molecule with a melting point of over 16000C. Methanol is a molecular compound (an alcohol) with a melting point of -980C
What substance has a higher melting point silicon dioxide or methanol?
SiO2
Does Chlorine or Silicon have a higher melting point?
Siliocone has a higher one. Chlorine is already a gas at room temperature.
Why silicon has a higher melting point than silicon tetrachloride?
Melting point depends upon the binding forces among the atoms or molecules and compactness of the material , the pure Silicon as an element has great compactness as compare to its compound SiCl4.
Why is the melting point of diamond higher than sulfur?
diamond has a 3 dimensional frame work of carbon and hence has high melting point
Why is diamond a unusual non metal?
non-metals have lower density, melting and boiling point but diamond has higher density, melting and boiling point.
Is the melting point for methanol higher than silicon?
Since at normal room temperature methanol is a liquid and silicon is a solid, it should be fairly obvious that the answer is "no."
Why Does Chlorine or Silicon have a higher melting point?
the further one moves down the periods, the melting point decreases. since sillicon is placed before chlorine, chlorine has lower melting point.
Which mealting point is higher neons or silicons?
At STP, neon is a gas, so its melting point is low whereas silicon is a solid, so its melting point is high
Why is the melting point of diamond higher than that of sodium chloride?
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