Why Does Hot Water Freeze Faster Than Cold Water
Olivia Luz
Today this phenomenon is known to the whole world as.
Factors that may cause hot water to freeze faster include evaporative cooling less chance of supercooling low concentration of dissolved gases and convection. The phenomenon when taken to mean hot water freezes faster than cold is difficult to reproduce or confirm because this statement is ill defined. However scientists have also demonstrated the mpemba effect with closed containers where evaporation doesn t take place. But observations over thousands of years as well as countless modern experiments have shown that the opposite is true under carefully controlled conditions hot water at times seems to freeze faster than cold water.
Sometimes hot water freezes more quickly than cold water. Hence the faster freezing. Different mechanisms come into play depending on the conditions. The research suggests that the longer path from a higher temperature to the freezing point.
Another is that warm water evaporates rapidly and since this is an endothermic process it cools the water making it freeze more quickly. None of these explanations are. This is called the mpemba effect after the student who observed it. The main factors appear to be.
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Evaporation more hot water will evaporate than cold water thus reducing the amount of water remaining to be frozen. Faster evaporation of hot water which reduces the volume left to freeze formation of a frost layer on cold water insulating it different concentrations of solutes such as carbon dioxide which is. Monwhea jeng proposes as a more precise wording. In 1963 when erasto mpemba was in his high school cooking class he noticed that his hot ice cream mix froze faster than his cold ice cream mix.
There exists a set of initial parameters and a pair of temperatures such that given two bodies of water identical in these parameters and differing only in initial uniform temperatures the hot. Hot water seems to freeze faster than cold water known as the mpemba effect.
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