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Water boils at 212 degrees Fahrenheit ( 100 degrees Celsius ) and immobilize at 32 F ( 0 C ) , ripe ? Sure , except that ’s not always true . The temperature at which water boils or freezes can interchange calculate on pressure and other constituent . So where on Earth do we need to go to find water ’s cool boiling temperature and tender freeze temperature ?
For water ’s depressed simmering temperature , we must look for the place with the thinnest zephyr .
At sea level, water boils at 212 degrees Fahrenheit (100 degrees Celsius). But what’s the lowest temperature that water can boil at on Earth?
" For water ’s boiling point , there is some meek addiction on humidness , but it almost all comes down to pressure , " saidJacob Roberts , a prof of physics at Colorado State University .
Impurities in water affect how water molecules interact with one another , ultimately change the point at which the whole solution come to a rolling boil . But if you take a bucket of pee to the top of a mountain , it will churn at a lower temperature than it will at sea grade . That ’s because the less the aura crowd on a pot of water , the less heat energy the water requires to zap , or change state into steam .
Naturally , the highest position on Earth — the acme ofMount Everest , at 29,031 feet(8,849 meters ) — is where water boil the coldest , at 154 F ( 68 degree Celsius ) , according to theLunar and Planetary Institute . It ’s red-hot pee — but it would make a terrible cup of coffee , as water needs to be at least188 F(87 C ) to make a decent brew .
At sea level, water boils at 212 degrees Fahrenheit (100 degrees Celsius). But what’s the lowest temperature that water can boil at on Earth?
link : How much water is in Earth ’s atmosphere ?
So where does H2O freeze at the highest temperature ? That ’s a lilliputian trickier . For pure water , at least , the temperature at which its molecules settle into the rigid , crystalline structures of ice quartz varies relatively little with air pressure . H2O ’s freezing point on Earth is always around 32 F.
That ’s not to say pressure does n’t bear on water system ’s freezing temperature at all — just that the pressures that occur naturally on the surface of our planet are nowhere most sufficient to poke at the freezing percentage point up . Even in theChallenger Deep of the Mariana Trench , which is far below ocean level than Everest ’s peak is above it , the pressure is more than 1000 times high than aviation pressure at ocean level , grant toUniversity College London . This mash water , but not enough to force weewee above 32 F into chicken feed — above 0 degrees C , water needs well-nigh 10,000 time atmospherical pressure to stop dead , which does not hap naturally anywhere on Earth .
However , ice at sea grade can take shape if the air temperature is above the freezing point , thanks to radiative cool down . For generations , this phenomenon has permit residents of desert locations to make ice-skating rink without electricity or freeze temperatures . the great unwashed living in what is now Iraq and Afghanistan would fill shallow pools with H2O before a cloudless Nox and wake up to ice , despite the air temperature being a few degrees above freezing .
— Why does paper teardrop more easily when it ’s besotted ?
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— Where is the cold billet on Earth ?
That ’s because the line above the pool is very dry , which promote the piddle to vaporise , Roberts told Live Science . The evaporate weewee brings heat with it , cooling the liquid left behind .
In accession , the body of water slowly radiates heating plant into the sky . While the aura near the ground might be just above freeze , the atmosphere higher up can be as cold as minus 40 F ( minus 40 C ) on a cloudless night . In this case , heat energy move from the comparatively warm piss to the extremely cold Nox sky . Both mechanisms together can throw off the temperature in the pool to 32 F — enough for it to immobilize — despite the border air temperature being as warm as41 F(5 C ) , which is well above freezing .
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