So, while I greatly appreciate the information that was given and it was exactly what I needed, and after thinking about this, I'm still trying to figure out how I would go about using known reactions and their heat of formations to determine the answer, using Hess's Law.
I'm currently learning Hess's Law, and I understand the theory of it and understand the problems given in my chemistry book. The problem is, in the book we are always given two or three known reactions to determine the heat of formation of a compound. It does not actually make me THINK about what reactions to use to determine it. How would I go about determining which known reactions to use to calculate the heat of formation of CuCl2·2H2O? I think that the fact that it is a dihydrate is really giving me headache here. Any help would be greatly appreciated! Thanks!