does hot water freeze faster than cold ?

Answer 1

NO.

"The results? The cold water froze about 10 or 15 minutes faster than the hot water, and there was no detectable difference between the boiled water and the other kind. Another old wives' tale thus emphatically bites the dust. Science marches on."

Answer 2

The answer to this question is yes and no!!! The results will depend to a great extent on the temperature range chosen Additionally, the results will be affected by any number of external factors: such things as - different definitions of what constitutes freezing, evaporation, convection, effects of boiling, supercooling and the effects of solutes.

As an example, a simple test of placing hot water and cold water into the freezer compartment of a refrigerator will doubtless result in the cold water freezing first but in an experiment conducted by Scientific American it was found that water heated to 195 degrees would freeze three to ten minutes faster than water at 140-175 degrees. Critics counter that this was most likely due to evaporation which may have resulted in as much as 16 % of water loss at the higher temperature compared to 7% for water at 160 degrees. The smaller the amount of water, of course, the faster it will freeze.

The issue has been researched ad-nauseum and it will no doubt continue to be researched for many years to come without agreement.

If you want to mull over the issue some more, there are countless sites on the internet dealing with this issue (just type into your search line something like - 'hot water freezes faster than cold') and you can also look up something called the 'Mpemba effect'.

Happy hunting!!

Answer 3

Yes because hot water will evaporate faster leaving less water to freeze

Answer 4

Hot water does not freeze!
It has to cool down first.
The rate of cooling is dependant on the temp of the water and the temp of the cooling source -
The greater the temp diffrential - the higher the rate of cooling, but as the temp of the water approaches that of the cooling source - the arate of cooling slows down

Answer 5

not sure but i think cold water freezes faster

Answer 6

Yes, Because the water is already hot (preferably boiling) it is more "willing" to change temperatures faster.

Answer 7

No, but if you have water the same temperature and put them in different refrigerators at different temps they will freeze at the same time (unless one of the temperatures is above the freezing point of course).

Answer 8

Yes

Answer 9

yes it dose , cold water also boils faster then hot tap water

Answer 10

actually it does, i saw an eppisode on bill nye the science guy and he proved it