The dominant molecular motion is vibration. In the liquid state molecules are unstructured and take the shape of their container. Many of the van der Waals' forces found in the solid state have been overcome in the liquid state. All types of molecular motion occur, vibration, rotation, and translation. In the gaseous state molecules are unstructured and flow freely.
Translation is the dominant motion, and molecular motion is random.
The heat capacity of water is 1 calorie, which is higher than most other substances because of the strong hydrogen bonds between water molecules. The latent heat of melting is the amount of heat that must be added to 1 gram of a substance, at its melting point, to break the necessary bonds to complete the change of state from solid to liquid. In both melting and vaporizing processes there is no temperature change until the change of state has occurred. The heat released in the process of freezing or condensing is equal to the heat required for melting or vaporizing, respectively. Heating 1 gram of ice from -40 to 0 degrees C requires 20 calories.