Pretty simple.. Just run the sim and change the temperature. See how the water molecules behave as the temp changes from 0 to 100 and back. Notice that below 100 c, some molecules escape the container and can be carried away by air currents. Evaporation, condensation, boiling and freezing. Hmm. Isn't water amazing.
Simulation of KMT and molecular motion from 0 to 100 deg.