I'm stuck in a structure and bonding question... Watch

C_Yap
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Diamond and Graphite both sublime - why do you think it is?

I just need some hints and not a full written answer. I know they have high melting points due to each carbon having many strong covalent bonds with adjacent carbons, so a lot of energy is required to break these bonds. But why are they sublime?

Any help appreciated
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charco
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(Original post by Baaah)
Diamond and Graphite both sublime - why do you think it is?

I just need some hints and not a full written answer. I know they have high melting points due to each carbon having many strong covalent bonds with adjacent carbons, so a lot of energy is required to break these bonds. But why are they sublime?

Any help appreciated
you are on the right lines. The energy needed to break the giant covalent lattice is more than enough to overcome the weak forces between un-bonded carbon atoms.
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