0
Methane, consists of discrete molecules with a formula CH4. Silicon dioxide, SiO2, is a covalent macro-molecule consisting of a lattice of covalently bonded Si and oxygen atoms (each silicon is attached to four oxygen atoms, each oxygen is attached to two silicon atoms.
Solid methane is held together by intermolecular forces- London dispersion forces, which are weak., so relatively little thermal energy is required to break up the solid (-182 0C) Breaking the silicon dioxide lattice requires the breaking of strong covalent bonds- which requires much more energy- so it melts at a much higher temperature, 1600 0C
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
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
How is melting point of silicon dioxide lower than melting point of diamond?
Smell
Why methane and silicon dioxide have different boiling points?
They're very different compounds in nearly every way; it would be considerably more surprising if they had similarboiling points.
What is the melting point of the silicon element?
The melting point of silicon is: 1 414 0C.
What are the elements found in sand?
Silicon and oxygen, in this form. SiO2 Silicon dioxide.
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
How is melting point of silicon dioxide lower than melting point of diamond?
Smell
What substance has a higher melting point silicon dioxide or methanol?
SiO2
Why methane and silicon dioxide have different boiling points?
They're very different compounds in nearly every way; it would be considerably more surprising if they had similarboiling points.
What is the melting point of silica crucibile?
The melting point of silicon dioxide is in the range 1 600-1 725 0C.
What does the formula SiO2 tell you about silicon dioxide?
It tells that silicon dioxide is composed of two different elements (Silicon and Oxygen) in a 1 to 2 atomic ratio ( Si1O2 ).
How is silicon dioxide different to polythene?
there is nothing different beetween them together
How are silicon dioxide and polythene different?
The silicon dioxide (SiO2) is not similar to polythene.
Is silicon dioxide a atom?
No, silicon dioxide is a molecule.
Is silicon in methane?
No. Methane contains only carbon and hydrogen.
Why is silicon dioxide a compound where as diamond is an element Explain?
Diamond consists of only one element (carbon). Whereas Silicon dioxide consists of two different elements (silicon and oxygen) that are chemically bonded in a fixed ratio. Hence Diamond is an element and Silicon dioxide is an compound.
What is the melting point of the silicon element?
The melting point of silicon is: 1 414 0C.
