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By evaporation
My sister had a book about that. It said "Michigan's great lakes keeps us warm in the winter and cooler in the summer. This is because water cools and warms up slower."
when water cools in a cloud? Condensation! :]
Lava cools in the ocean waters. It will also cool down as it moves.
Earthen pot has tiny pores on its surface. The water oozes out from these pores. It then evaporates taking energy known as "latent heat" from the pot. Thus, the temperature of the water inside decreases. This process goes on and this is the reason why the water in earthen pot is cooled faster.
Earthen pots have tiny holes in them through which some of the water keeps seeping. But it is not noticeable. The water which is now outside the earthen pot evaporates. Durin evaporation, the water gain heat energy from the surroundings to evaporate. Thus the surroundings and the water in the earthen pot loses heat energy and cools gradually.
Evaporation is an endothermic process.
An earthen pot has small pores in its walls. When water is poured into it, some of it seeps through these pores to its outer surface. On reaching there, it evaporates.The heat required for evaporation is taken from the earthen pot and from the water in it. As a result, the water in an earthen pot gets cooled down.
By evaporation
new earthen pots enable the water inside to seep outside to a certain extent which makes the surface of the pot damp.this moisture then evaporates and cools the water inside,but in older earthen pots seeping of water does not take place to an extent when it was new.therefore old earthen pots does not cool the water inside
Evaporation cools it.
This Cooling effect is based on the principle of Evaporative Cooling or simply cooling thru evaporation.....An earthen pitcher has pores through wich water propagates or oozes out and evaporates...the heat required for evaporation is taken up by the liquid itself...hence the heat pays off and the water gets cooled.
The earhern pots used for keeping water cool in summer have small pores in it.water seeps in these pores and evaporates.as evaporation causes cooling, earthen pots remain cool.
An earthen pitcher is a round shape vessle made by moist clay.Moist clay is placed on a circulating wheel and the clay is then given the shape of a round vessle.It is then kept for few days as the water of clay evaporates.Then the vessle is placed in the kiln at a very high temprature to streangthen the vessle for few hours.This round shape vessle is than called"EARTHEN PITCHER".It is widely used to store drinking water in INDIA,PAKISTAN,SRI LANKA,BANGLA DESH,MAYAMAAR,CHINA....and host of other contries as the water oozes out from the very small pours of picher and provides cooling by evaporation.
Her last name was Pitcher because her job was to give pitchers of water to her war people on the hot summer days.
Depends whether the earthen pot is baked or not, if it is, it's safe to keep it.
During hot summer days, water is usually kept in an earthen pot (called matka) to keep it cool. Let us see how it gets cooled. The earthen pot has large number of extremely small pores (or holes) in its walls. Some of the water continuously keeps seeping through these pores to the outside of the pot. This water evaporates (changes into vapour ) continuously and takes the latent heat required for vaporisation from the earthen pot and the remained water. In this way, the remaining water loses heat and gets cooled. This is also an example of the cooling caused by evaporation. It should be noted that all the water on the earth does not gets evaporated due to the high value of the latent heat of vaporisation of water. It is much less effective in humid environments than arid ones since high humidity limits the amount of evaporation.