Corroboree is the aboriginal word for a gathering or meeting. Its meaning however is much more complex. It includes not just the idea of a physical bringing together of tribes, but a meeting of minds and philosophies, of gradual growth-a gathering of momentum as the tribes arrive. virtual corroboree. Project Corroboree is, very aptly, the first project on frogs.org.au to include an online meeting-ground. In the frogs.org.au Community you can share your thoughts on the corroboree frogs and disappearing frogs with users of the site.
Except for in giant molecular substances, like diamond. Van der Waals forces or hydrogen bonds. To melt or boil a simple covalent compound you only have to overcome these two forces that hold the molecules together. You don't need to break the much stronger covalent bonds that hold the atoms together in the molecules.
Phase Change and Latent Heat. There is chemical potential energy in the weak van der Waals attractions as well as in the strong ionic and covalent bonds. Because the van der Waals attraction is so much weaker, there is much less chemical potential possible here, but it is a major factor in the energy of phase changes.