Why Does Hot Water Freeze Faster Than Cold Water
Olivia Luz
Hot water seems to freeze faster than cold water known as the mpemba effect.
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. 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. Today this phenomenon is known to the whole world as. 6 years later in 1969 he published the results of his findings.
Sometimes hot water freezes more quickly than cold water. Monwhea jeng proposes as a more precise wording. The effect was named after the tanzanian student who in 1963 noticed that hot ice cream mix freezes faster than a cold. 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.
The research suggests that the longer path from a higher temperature to the freezing point. This is called the mpemba effect after the student who observed it. However scientists have also demonstrated the mpemba effect with closed containers where evaporation doesn t take place. There is no definitive explanation for why hot water may freeze faster than cold water.
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Evaporation more hot water will evaporate than cold water thus reducing the amount of water remaining to be frozen. Another is that warm water evaporates rapidly and since this is an endothermic process it cools the water making it freeze more quickly. The phenomenon when taken to mean hot water freezes faster than cold is difficult to reproduce or confirm because this statement is ill defined. The main factors appear to be.
Under certain forces from the laser the hottest beads cooled faster than the lower temperature beads. Factors that may cause hot water to freeze faster include evaporative cooling less chance of supercooling low concentration of dissolved gases and convection.
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