Sunday, May 28, 2023

Does the hot water freeze before the cold? This is how the Mpemba effect works

Due to the weather in Chile we could not verify it, however Ocean Eyes aroused the curiosity of many among the people videos of those who are in the places where they are temperatures there is nothing below and what they do is mysterious experiment.

He is going out on the patio, taking a cup of boiling water and throwing it in the air. The effect is serious, as the liquid quickly solidifies, so that later it turns into snow, a phenomenon that science cannot yet explain.

But this is not the only thing that happens. Indeed, It is freakwhat is called Mpemba makes hot water cold faster than cold. For example, if you have two containers of water, one at 35 degrees Celsius and the other at 100 degrees Celsius, and you put them in the freezer at the same time, against all logic, the warmer one will last faster.

Why does hot water last before cold? This is how the Mpemba effect works

This is what they call the phenomenon that makes a hot liquid faster than a cold one, under certain conditions.

The story goes back to the time of Aristotle, some three hundred and two years ago, but by Erastus Mpemba (hence the name effect), a Tanzanian high school student who, together with physicist Denis Osborne, first investigated it in the 1960s.

A few months ago, social networking became popular. A kind of “challenge” or challenge was created so that all those who spent the winter outside their homes in sub-zero temperatures could test this mysterious effect.

Why does hot water last before cold? This is how the Mpemba effect works

The phenomenon still does not have a scientific explanation and it is difficult, due to its characteristics, to replicate it in the laboratory, which in the depth of the analysis, even the smallest system has to be considered.

Although in some cases a series of explanations is proposed for Mpemba, such as convection (a process in which heat is transferred between two substances: liquid and gas), evaporation, supercooling, impurities dissolved in water or vapors.

Does the hot water freeze before the cold? This is how the mpemba effect works

But none of them scientifically accepted, as “physically unconvinced”; at least considering how physics has been understood in modern times.

In fact, in 2016, a group of researchers from Britain tested the effect: they wanted to measure the temperature of the water in the process; values ​​depending on where the thermometer detects the position, so it is a system that is not in “equilibrium”, since it shows the difficulty of searching for the effect of Mpemba, since it very easily results in false results.

World Nation News Desk
World Nation News Desk
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