The Mpemba effect is the observation that very hot liquids or colloids (such as ice cream) can freeze more quickly than colder ones, for similar volumes and surrounding conditions.

Mar 12, 2024 · What Is the Mpemba Effect? The Mpemba effect is a physics concept that postulates that when hot water and cold water are placed in the identical freezing environment, the hot water will …

Mar 20, 2025 · At its simplest, the Mpemba effect refers to situations where hotter substances cool more quickly than their cooler counterparts, sometimes even freezing faster. Most famously, this has been …

Mar 28, 2025 · The striking effect of throwing hot water into super-cold air and creating instant snow is said to be a manifestation of the Mpemba effect.

Under some conditions the initially warmer water will freeze first. If this occurs, we have seen the Mpemba effect. Of course, the initially warmer water will not freeze before the initially cooler water for …

Mar 26, 2025 · The Mpemba effect, whereby hotter systems can cool faster than cooler ones under identical conditions, was first noted by Aristotle over 2,000 years ago. It was rediscovered in 1963 by …

Jul 15, 2025 · Explore the Mpemba effect, the surprising phenomenon where hot water can freeze faster than cold. Learn the thermodynamics, experiments, and current science.

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.

It is counter-intuitive since cold water should be closer in state to frozen water (ice), than hot water; it, therefore, should freeze quicker. Experiments do not show the effect every time.

In the Mpemba effect, an initially hot system that is rapidly quenched into a cold bath reaches equilibrium with the bath sooner than an initially cool system.