Physical properties of water, III
In liquid water, H2O molecules tend to cluster; in clustered state, H2O molecules are held into weak structure by hydrogen bonds
Clusters form & break up very rapidly - 1010 or 1011 times a second
When one adds heat to water, much of the energy goes to altering the inter-molecular structure rather than to increasing the kinetic energy of H2O molecules
Water has an extremely high heat capacity = 1 cal/g/°C