3 ms·

Another interesting one about water that is unknown, or at least not proven (many credible theories). Why does hot water freeze faster than cold water. http://

• elektromekatron 11y ago
  If we are just talking about ice formation and not the point at which the whole thing freezes, then I would expect there to be many systems where the hotter vessel would form ice quicker when put in a very cold environment. Heat being essentially kinetic energy averaged, the greater the initial energy compared to the available drop, the faster it is for large variations to develop.
• cmdrfred 11y ago
  Bill Nye explained it in his show that hot water evaporates so you are freezing a lesser volume of water.I have no idea if that's correct but that's the assumption I've gone on for the last decade or so.
• Retric 11y ago
  There seem to be a lot of 'minor' effects. However, the most convincing argument I have seen was simply increased thermal conductivity by partially melting the surface below the container. A good test of this would be to start with a warm container and then add hot or cold water to it.