Originally Posted by
kadybug
Take it from a Chemist that can tell you why hot water freezes faster......:FIREdevil
You have to go down to a molecular level. Molecules is hot water move more rapidly than in cold water. This movement of molecules is referred to as:
Brownian Movement. When molecules are moving that fast and they collide into one another and bounce around, the faster the molecules will move. Molecules can be moving so rapidly that they can be dispersed outside of the container that they are in, in this case;water pipes. This causes a lesser amount of water to be in the container and therefore a lesser amount of molecules to bounce around and a lesser amount of water left to freeze. The fewer the molecules=the lesser movement of molecules=the faster the water will freeze.