Re: Boiling Point
SiF4 (-86 C) has a higher boiling point than SiH4 (-112 C). SiF4 is larger and has more electrons, making it more polarizable. This increases the induced dipole-induced dipole forces.
Which has a higher boiling point SiH4 or GeH4?
The bigger the atoms, the more polarisable their electron clouds and the greater the dispersion forces. Hence boiling points are in order: SnH4 > GeH4 > SiH4 > CH4.
Why does silane have a low boiling point?
Methane and silane are non-polar, because of the tetrahedral shape and also the small electronegativity differences. Because these don’t have dipole-dipole forces, the boiling point will depend on how strong the London forces are.
What is the difference in boiling point between CH4 and SiH4?
As a result, the id-id interactions between SiH4 molecules are stronger than those between CH4 molecules and require a greater amount of energy to overcome these interactions. Hence boiling point of SiH4 is greater than boiling point of CH4.
Are dispersion forces strong?
The London dispersion force is the weakest intermolecular force. The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. This force is sometimes called an induced dipole-induced dipole attraction.
Is the boiling point of SiH4 higher or lower than that of PH3?
Problem: The boiling point of CH4 is lower than the boiling point of SiH4, whereas the boiling point of NH3 is higher than the boiling point of PH3. The lower boiling point of CH4 compared si SiH4.
Which of the following molecules has the highest boiling point SiH4?
As a result, the id-id interactions between SiH4 molecules are stronger than those between CH4 molecules and require a greater amount of energy to overcome these interactions. Hence boiling point of SiH4 is greater than boiling point of CH4.
What does it mean to have a higher boiling point?
To simply put, it measures the temperature at which a chemical boils. Similar to melting point, a higher boiling point indicates greater inter-molecular forces and therefore less vapour pressure.
Does SnH4 exist?
Our results reveal the appearance of unique chemistry of SnH4 at high-pressure and suggest the high superconductivity of SnH4 under pressures that are accessible by current experi- mental technique.
Why does SiH4 have a lower boiling point than SiO2?
SiH4 is composed of molecules, for which the only intermolecular forces are London dispersion forces. London dispersion forces are much weaker than covalent bonds, so SiH4 boils at a much lower temperature than SiO2.
What type of solid is SiH4?
The phase is an insulating molecular solid with a monoclinic unit cell containing four tetrahedrally bonded molecules, space group P21 /c.
Why CH4 has lower boiling point than SiH4?
as compared to other members of group IVA of periodic table(Si,Ge,Sn). That’s the reason hydride of carbon(CH4) has less intermolecular attraction(London forces) than hydrides of other members(SiH4,GeH4,SnH4). So CH4 has lower boiling point than others.
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