Freezes first hot or cold water?
is one of those questions that are continued to be debated on. The reason seems
to be that it will depend on several factors.
if the water is boiled first?
the type of container used make a difference, e.g., metal or Styrofoam, plastic
the amount of water exposed to air make a difference?
effect do various solutes have?
Google for information on water and ice: