Does warm water freese faster than cold water?
143220
Yes, only if the volume difference is enough to compensate for the difference in temperature.\n\nOtherwise, no.  It is not logically or physically possible, given the same amount and the same environment.
45062
The hotter it is, the faster I think it will desolve. Hot liquids are moving at a faster rate, so the water molecules would be "bummping" into the aspirin more. This would cause it to disolve faster. Also, the hotter the liquid, the faster other things like sugar disolve.
100228
The temp. between hot water and steam is a big difference. Say that steam is at 400 degrees F and hot water is 180 degrees F, steam will boil your hand faster then hot water.
55041
Fresh water evaporates faster than the solutions will.  Between the solutions it would depend on the number of particles dissolved in the water.
1163536
The definition of freezing is that they reach 0C, not that they turn to a solid, that is a separate step.  Hot water pipes and cold water pipes, both in an identical freezing environment will cool down at different rates because the higher the temperature gradient or difference, the faster the rate of cooling.  So hot water will cool faster to 0 than cold water, although cold water will form ice faster since overall it requires less heat overall to be removed to freeze.\nNote that practically the hot pipe will take longer to freeze solid since there simply needs to be more energy removed to get the solid.  This question is normally asked theoretically to demonstrate (or trick a student) to teach the lesson about how larger temperature gradient have a higher cooling speed relative to the lower temperature gradient.  It depends on the reason for asking this question.\n\nNote that the Mpemba effect, while it has been observed, is only under specific experimental conditions and is far from a general phenomenon and not general enough to effect the average set of pipes in the average house basement.
183968
when i was in 3rd grade i did onw on what freezes faster.... hot cold or salt water. actually got frist prize in the school science fair and 2 in district
1019637
yes sound does travel faster in denser mediums, but when the temperature of a medium drops, then the viscosity of the medium drops as well, then even though the density would get higher, the sound would still slow down, because of the now less viscous medium.\na hotter medium would be more viscous then a cold one, therefore, sound travels faster in hot water, then it does in cold water
662532
Hot water will drop in temperature at a faster rate, but the cold water will freeze first except under certain circumstances in a phenomenon known as the Mpemba Effect\n\nhttp://math.ucr.edu/home/baez/physics/General/hot_water.html for more details on the phenomenon
451840
Quite obviously faster. To boil over and turn to vapour, the water molecules near the surface need a lower amount of energy when the water is being boiled in a rarer atmosphere.
596165
Given a fixed power of heat input water would take longer due to its specific heat capacity being large.  4180Joules/kg/degree, compared with 450 for iron & 880 for Aluminium (figures STRICTLY only from memory and not to be relied on)\nOther than that are consideration of good conduction of heat in metals versus convection transporting the heat quickly within the water.\nAlso practically speaking, you might need to allow for evaporative heat loss from the water surface.
136240
I think kurdiatcha needs a hug\n\nThe concept you are questioning is called "specific heat capacity" liquid water has a very high specific heat so it would take longer to reach room temp.
426088
actually, water heats up and cools off slower than soil.  Water takes more energy to heat up and once it gets the energy it takes time for it to lose it. Citys near water have a more constant temp. than cities that arent near water. It can be 80 one morning in Kansas then 10 degrees that night
477805
Warm air can hold a lot more water in it than cold air can-just like warm water can dissolve more salt.  Very cold air just cant hold very much water.  In addition, there is a much higher rate of evaporation during warm weather than during cold weather.  However, in tropical climates it is often the case that it is more humid in "winter" because that is the rainy season.
461446
I found that cold water (38 degrees Fahrenheit) froze faster than hot water out of the tap (125 degrees F). I chose these two temperatures because (1) they were pretty much what the average amateur ice-cube maker would have readily available and (2) I couldn't find a mercury thermometer that went higher than 125 degrees.\n\nJearl, who is not afflicted with penny-pinching editors like some of the rest of us, was able to get his mitts on a thermocouple that could measure as high as the boiling point, 212 degrees F. He found that water heated to, say, 195 degrees would freeze three to ten minutes faster than water at 140-175 degrees. (There were differences depending on how much water was used, where the thermocouple was placed, and so on.) \n\nJearl suggested that the most likely explanation for this was evaporation: when water cools down from near boiling to the freezing point, as much as 16 percent evaporates away, compared to 7 percent for water at 160 degrees. The smaller the amount of water, of course, the faster it freezes. \n\nIn addition, the water vapor carries away a certain amount of heat. To test this theory, Jearl covered his lab beaker with Saran Wrap to prevent water vapor from escaping. The freezing rate difference was greatly diminished. Conceivably convection (motion within the water) also plays a role.\n\nFascinating as all this no doubt is, all it basically proves is that very hot water freezes more slowly than very VERY hot water. The ordinary fumbler in the fridge, on the other hand, is dealing with temps more like the ones I was measuring, in which case cold freezes faster than hot. I rest my case.
509125
No it's not true.  Cold water goes in cold and uses energy thus burning calories to come out warm.
635448
For Fastest Speed, Hot water\nFor safer method, cold water
129649
You don't shrivel, but your skin gets baggy. It has absorbed water. Osmosic rate will be greater in warmer water because diffusion rates will increase (Graham's Law).