will hot water freeze faster than cold water?

Answer 1

No.

Old wives' tales.

Answer 2

The answer depends on what is meant by freezing. If it means to become a solid, the answer is no because the heat loss of the liquid to the frozen temperature of water plus the heat loss of freezing need to be overcome, and the first stage of heat loss requires more heat loss for hot water compared to cold.

The normal way this question is asked is a trick because water is technically frozen when it reaches 0C, but it has not turned solid yet. Then the hot water cools faster because the rate of cooling is proportional to the temperature gradient (or temperature difference) which is steeper for hot water than cold water.

Answer 3

The molecules in hot water are moving around so rapidly as apposed to cold water. In boiling water, the molecules are moving much faster than hot water. It takes time to change from each state. So cold water is closer than hot water to the frozen state but not by much at all.

Answer 4

yes the hot water molecules are moving faster than cold water molecules, dispersing the higher temp out of the water making the water freeze in half the time

Answer 5

yes, but not if its boiling
if you fill an ice cube tray with hot tap water, it will freeze before a tray with cold water will freeze under the same conditions.

edit: feel free to ignore everyone else who says otherwise. We actually tested it in a lab for school, so its true.

Answer 6

no cold before hot cause the hot needs to cool before freezing cold water freezes quicker.

Answer 7

No. For any liquid to freeze, it must first be reduced in temp to its freezing point. This requires a certain amount of energy per ml of liquid involved per degree needed, so the further from its freezing point, the more energy that needs to be released and the longer it will take.

Answer 8

yes, hot water freezes more rapidly than cold water

Answer 9

No.

using the collision theory of molecules, as temperature increase enery of molecule increase and vice versa.

however, when water freeezes, hydrogen bonds are formed in between water molecules. thus, if the temperature is high, water molecules have more energy to move around, it can break the hydrogen bonds easily as hydrogen bond is a weak bond.

Answer 10

No.
According to chemistry and such scientific things, the temperature has to change, and go through each stage.
It won't skip stages, and freeze faster.

Answer 11

ive heard that this is true, and conversely that cold water will boil quicker than hot water. go figure