How does the water kept in an earthen pot become cool during summer?
You may be wondering if this a magic? No, it’s not, it’s a pure physics we can also say it’s magic though.
In this post, I will explain in details everything you need to know about how the water kept in an earthen pot become cool during summer.
So let’s get started.
How does the water keep in an earthen pot become cool during summer? Evaporation caused this, when water reaches the boiling point it create vapour or (gaseous), earthen pots always has a small hole, through those holes the vapor oozes out to the air, anytime water absorbs heat, it changes the water to Vapour, based on the process of frequent absorption of heat from water inside the Matka, in few hours, this water will become cold.
Now let’s take a more in-depth look at this for a better explanation and to make you understand this clearly.
Sorry to be so technical. I’ll try to make it simpler. You see earthen pots have a structure sort of like a sponge. Only the holes are much much tinier. So minuscule amounts of water slowly making its way towards the outer side of the pot. You can touch the surface of any pot with water and find that it’s always wet.
Now some of this water slowly evaporates out into the surroundings, taking some of the heat of the water with them. Thus you end up with colder water. Simple but effective.
As we all know or just known, that the earthen pot is somewhat porous, and that capillary action allows the water to pass through the walls of the pot and evaporate on the outside of the pot. I want to add some numbers – to cool 1 gram of water by 1 degree Celsius (roughly 2 degrees Fahrenheit), you have to get rid of 4.2 Joules of heat energy. Evaporating a single gram of water (breaking the bonds between the water molecules to take them from liquid water to steam) consumes 2,200 Joules. So evaporating a little bit of water will chill a lot of water. To chill 1 liter of water by 10 degrees Celsius, you’d have to evaporate about 20 g of water. Certainly worth it. Which, by the way, is also why we sweat – it’s a great way to get rid of a lot of excess heat from exercise, etc.
A couple of other factors will influence the cooling effect. I would guess that the capillaries of the earthen pot will have some impact on the heat of evaporation. Also, the amount of water molecules in the external environment (humidity) will have an effect on the rate of evaporation, and if the rate is too slow, then heat influx from the environment will cancel any cooling gained from evaporation.
You might be asking what evaporation is?
Evaporation is the process by which a liquid changes into its way purrs at a temperature below the boiling point of the liquid.
What is evaporation in the water cycle?
Water evaporation: Water may be a development of passing from liquid to gas. Evaporation occurs at the surface of the water.
The water evaporates at each temperature; however, boils at a hundred °C.
- The temperature is constant during boiling. It is possible to say that evaporation along boiling is more.
Most evaporation takes place on the surface of large water bodies like the oceans.
Water evaporates from water sources and forms clouds within the kind of gas within the atmosphere.
Then our world returns as rainfall.
Based on the temp., this may be probably snows, hail, or rain.
- What we have a tendency to decision wetness within the air we have a tendency to breathe is additionally vapor.
Part of the gas mixture in the atmosphere is water vapor.
The porous structure of the pot allows the water in contact with air through the outer surface of the pot which works as a heat exchanger by surface evaporation of water due to this the temperature of the inner surface of the pot get lowered, and thus water remains cold.
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