|Aug13-09, 02:57 PM||#1|
Van der Waals'
1. The problem statement, all variables and given/known data
2. Relevant equations
3. The attempt at a solution
I think Graphite is a Van der Waals' Solid and, er, salt would be an ionic.
But I really don't have much of a clue about what the second part is going on about!
|Aug13-09, 04:32 PM||#2|
Can't see the attachment yet. While Coulomb interaction dominate the interplay between electrons in graphite, I do believe the force holding the layers together could be referred to as van der Waals.
|Aug14-09, 09:38 AM||#3|
The second part is asking you for the variation of potential (attractive term) with respect to the distance between the particles, so for the van der Waals' forces, the Lennard-Jones potential applies, while for the ionic forces, the Coulomb potential applies. This would give [tex]\beta[/tex] as 6 for the former and 1 for the latter.
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