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Why Graphite has high melting point than Diamond?

Answer» Carbon (diamond) has a melting point of 4440°C at 12.4 GPa.Carbon (graphite) has a melting point of 4489°C at 10.3 MPa.The melting point of graphite is slightly larger than the melting point of diamond, because in graphite C-C bonds have a partial double bond character and hence are stronger and more difficult to break. There are also Van der Waals forces between the layers of graphite but these are relatively weak in comparison to a covalent bond. These weak forces allows layers of graphite to slide past each other.


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