Does hot water freeze faster than cold water? - Mit Engineering
Does hot water freeze faster than cold water? It’s an age-old question with a simple answer: no. By Sarah Jensen. Since the time of Aristotle, researchers and amateur scientists alike have batted about the counterintuitive theory that hot water freezes faster than cold.
The Mpemba Effect: Does Hot Water Really Freeze Faster Than Cold Water …
2024年3月12日 · Under the right conditions, hot water can somehow freeze faster than cold water. It's called the Mpemba effect. We'll explain how it happens.
Does Hot Water Really Freeze Faster Than Cold Water?
2017年2月9日 · Does hot water freeze faster than cold water? It seems obvious that the answer should be no, because all things being equal, hot water takes longer to cool down than cold water, and so it couldn't possible freeze faster.
Is It True that Hot Water Freezes Faster than Cold Water or that Cold …
1998年10月21日 · "To the first part of the question--'Does hot water freeze faster than cold water?'--the answer is 'Not usually, but possibly under certain conditions.' It takes 540 calories to vaporize one gram...
Mpemba effect - Wikipedia
The Mpemba effect is the name given to the observation that a liquid (typically water) that is initially hot can freeze faster than the same liquid which begins cold, under otherwise similar conditions. There is disagreement about its theoretical basis and the parameters required to produce the effect.
Why Does Hot Water Freeze Faster Than Cold Water?
2015年12月4日 · The most commonly proposed hypothesis - and one that's probably somewhat responsible for the effect - is that hot water evaporates more quickly, losing mass and therefore needing to lose less heat in order to freeze. However, scientists have also demonstrated the Mpemba effect with closed containers where evaporation doesn't take place.
Does Hot Water Freeze Faster Than Cold? Physicists Keep Asking ...
2022年6月29日 · A more mundane explanation is that hot water evaporates faster than cold, decreasing its volume and thus the time it takes to freeze. Cold water also could contain more dissolved gases, which lower its freezing point.
The Physics of Why Hot Water Sometimes Freezes Faster Than Cold Water
2020年8月12日 · Under certain forces from the laser, the hottest beads cooled faster than the lower temperature beads. The research suggests that the longer path from a higher temperature to the freezing point...
Can hot water freeze faster than cold water? - Department of …
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.
Is It True Hot Water Freezes Faster Than Cold? - ThoughtCo
2018年12月2日 · Sometimes hot water freezes more quickly than cold water. This is called the Mpemba effect after the student who observed it. 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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