Does hot water freeze faster than cold water Mythbusters?
If the water is initially hot, cooled water at the bottom is denser than the hot water at the top, so no convection will occur and the bottom part will start freezing while the top is still warm. This effect, combined with the evaporation effect, may make hot water freeze faster than cold water in some cases.
How long does boiling water take to freeze?
If your water is cold or really hot, the water will freeze even faster (around 45 minutes).
Why does boiling water instantly freeze?
When you boil water, you’re adding energy to water in its liquid state. … Because they’re so hot, those tiny water droplets start to vaporize. But since cold air can’t hold as much water vapor as warmer air, the water condenses. Extremely cold temperatures quickly freeze the water droplets, which fall as ice crystals.
What boils faster hot water or cold water?
Which boils faster—hot or cold water? Despite a long-standing myth to the contrary, cold water does not boil faster than hot. But hot water may carry more impurities—perhaps the myth arose out of a desire to encourage people to cook with cold water.
What liquid freezes the fastest?
Water did freeze the fastest with an average of 56.6 minutes.
Will pipes freeze at 26 degrees?
There is no simple answer. Water freezes at 32 degrees Fahrenheit, but indoor pipes are somewhat protected from outdoor temperature extremes, even in unheated areas of the house like in the attic or garage. … As a general rule, temperatures outside must drop to at least 20 degrees or lower to cause pipes to freeze.
Does hot water freeze faster in the freezer?
Hot water can in fact freeze faster than cold water for a wide range of experimental conditions. This phenomenon is extremely counterintuitive, and surprising even to most scientists, but it is in fact real. … The phenomenon that hot water may freeze faster than cold is often called the Mpemba effect.
Does ice melt faster in hot water?
Ice made with hot water tends to contain less dissolved air. The latter tends to lower the freezing point, so ice made from cold water will melt at a higher temperature.
How cold does it have to be to freeze boiling water instantly?
The smaller streaks are from condensate coming off falling water droplets — not water that has frozen midair. The air is not quite cold enough to freeze water immediately, which happens at about minus-42 degrees, Terry said.
What happens if you throw boiling water into freezing air?
It instantly evaporates into a cloud of water vapour, some of it coming down around him like snow. The scientific theory known as the “Mpemba effect” explains the phenomenon: hot water evaporates more quickly than cold water.