Which has higher melting point SiO2 or NaCl?
Table of Contents
Which has higher melting point SiO2 or NaCl?
If we go through molecular mass then ans is SiO2 but NaCl is ionic and SiO2 is covalent so NaCl should have more melting point.
Why is SiO2 melting point higher than NaCl?
lattice. SiO2 is a covalent network compound with a very high melting point as strong covalent bonds need to be broken.
Why is SiO2 have a high melting point?
Where SiO2 has strong covalent bonds between molecules, SO3 only has weak van der waals intermolecular forces holding its molecules together. Since covalent bonds require more energy to overcome than van der waals, SiO2 requires a higher temperature than SO3 to melt, thus SiO2 has a higher melting point.
Which of the following solid has maximum melting point nacl ice dry ice SiO2?
Silicon dioxide solid has the maximum melting point in the given list.
What is the melting point of dry ice?
-69.9° F
Facts about dry ice
| Property | Value |
|---|---|
| Melting Point | -69.9° F, 75.1 PSIA |
| Boiling Point | -109.3° F (Sublimes) |
| Triple Point | -69.9° F, 75.1 PSIA |
| Critical Temperature | 87.8° F |
Why does SiO2 have a higher melting point than co2?
The covalent bonds of SiO2 are much stronger than weak intermolecular forces of CO2 and so take more energy to be broken, therefore the melting point of SiO2 is much higher than that of CO2 .
Why does SiO2 have lower melting point than Al2O3?
Na2O, Al2O3 and MgO are ionic oxides and hence have a high melting point. MgO and Al2O3 have a higher melting point than Na2O since the charges are higher, resulting in a stonger attraction between the ions. SiO2 has a giant covalent structure and hence a high melting point. The melting points are thus much lower.
What is the melting point of nacl?
1,474°F (801°C)
Sodium chloride/Melting point
Why does SO2 have a lower melting point than SiO2?
In the solid phase, SO2 consists of discrete molecules with dipole-dipole and London (dispersion) forces among the molecules. These forces are relatively weak and are easily overcome at a relatively low temperature, consistent with the low melting point of SO2 .
Which substance has the highest melting point KCl or SiO2?
KCl has ionic bonds. SiO2 is a network solid held together with covalent bonds. Network solids are stronger than ionic compounds, thus, SiO2 will have a higher melting temperature.