Determine the Heat of Fusion of water. Fusion is an endothermic process and very much depends on the strength of the intermolecular attractions between molecules.
Calorimetry is a technique which measures heat changes by monitoring temperature changes.
A calorimeter is a device used in such a measurement. A calorimeter can be constructed from two stacked styrafoam cups covered by a sheet of aluminum foil. A thermometer is inserted in a small hole in the foil. The body of the calorimeter should insulate the interior from the surroundings. The sum of all energy changes inside the calorimeter must therefore add up to zero.