What is the hottest temperature theoretically possible in the universe?
365771
as temperature increases the definition becomes blurred, the higest extremes i know are:\n\n1 * 10^12 Kelvin, matter turns into a quark-gluon plasma (a state in wich protons, newtrons, and other fundamental particles, break down into quarks)\n\n1 * 10^27 Kelvin, symetry The Grand Unified theory (of quantum mechanics) is broken, predicted to have ocurred 1 * 10^-37 seconds after the Big Bang
580963
Hottest - The Sun\nCoolest - Deep Space
1093890
The Earth's atmosphere has some capacity to hold in heat but not much of one. A relatively simple calculation would show that the Earth's surface temperature would drop by a factor of two about every two months if the Sun were shut off. The current mean temperature of the Earth's surface is about 300 Kelvin (K). This means in two months the temperature would drop to 150K, and 75K in four months. To compare, the freezing point of water is 273K. So basically it'd get too cold for us humans within just a few weeks.\n\nhttp://curious.astro.cornell.edu/question.php?number=656\n\nBut as for absolute zero, NASA states "The Earth cannot drop to Absolute Zero because the universe would keep it above 2.7 K. Without the Sun, the only energy to the surface of the Earth is the heat from it's own interior."\n\nhttp://image.gsfc.nasa.gov/poetry/ask/q2895.html
507518
The coldest temperature in deep space is -454 degrees Fahrenheit, 2.728 degrees above absolute zero. This universal temperature is called the cosmic microwave background radiation and is the leftover temperature from the Big Bang which started out at about 2^13 degrees Fahrenheit.
166184
The frequency can be converted to energy, which has an equivalent temperature. Your question is rife with confusion. I attached a reference about the Big Bang that might clear some of it up.\n\nHere is the way to get the temperature of a wave of frequency f:\n\nE=hf\n\nwhere E is energy and h is Planck's constant. Also, for each degree of freedom, \n\nE=kT/2\n\nso for the photon with 2 degrees of freedom (2 spins), \n\nE=kT\n\nwhere k is Boltzmann's constant (the universal gas constant divided by Avogadro's number), and T is temperature.\n\nso T=E/k=hf/k \n\n(see references)
345612
It is interesting that infinite temperatures are not ruled out by the theory of thermodynamics, but it is also interesting that it is not possible to heat a body to an infinite temperature. In order to heat a body you need a hotter body - which is not possible when you reach infinite temperatures.\nSome really hot things that I can think of are: \nThe centre of the Sun: 15,600,000 K \nThe corona (outer atmosphere) of the Sun: over 1,000,000 K \nThe tenuous electron gas in clusters of galaxies: 100,000,000 K \nAccretion disks around stellar mass black holes: over 1,000,000 K
825292
i guess I'm wrong   but I thought that water would  freeze at 0  degrees celsius.  also it would boil at 100 degrees C. Even in a vacuum.  my guess!  btw at absolute 0  kelvin,  does that only exist in a vacuum?  If we could reach  - 450 degrees F.  would our cpu's operate at an infinite speed.....got me on this one.  I'm not sure on how atmospheric pressure relates to these conditions.  But I know someone knows!
290402
Yes. Since temperature is a measurement of average kinetic energy of an atom, when you get to the point that atoms disassociate (come apart), you no longer have anything to measure.\n\nHowever, above that certain point, the kinetic energy of a system is measured by particle energy.\n\nIf you look at big bang theories, you will note that the universe began at a high temp, which would probably be the maximum.
435275
There are many places on earth that are plenty hot - record-breaking hot. In fact, there's a good chance on the day this record-breaking temperature was recorded by a meteorological station in El Azizia in 1922 there were other places hundreds of miles away that were even hotter. In all likelihood, this record temperature has been exceeded since then in many places on earth, but we have no official records of the temperatures. It is important to note that when atmospheric temperatures are recorded it is not the surface temperature, where it can sometimes reach 150° F/ 66° C,
12569
Hot and cold are relative words we use to describe heat sensations.  As such they can not form true ratios.  Is laughter twice as good as sadness?  But in the lab, temperatures must be compared in ratios, such as to solve the perfect gas equation, and absolute temperature must be used.  For example your friend lives 100 miles from Chicago and you live 10 miles beyound that.  If you walk ten more miles farther away from Chicago are you now twice as far away as you were?  NO!  Using absolute values you must walk 110 miles farther away.\n\nFor temperatures, Absolute zero is -273K (minus 273 Kelvin degrees).  That is the temperature at which all thermal energy has been lost for all matter.  (It is like Chicago in our simple example).  Therefore, O Celcius is plus 273K and twice as cold (or half as hot) would be 136.5K or minus 136.5C, which is indeed very cold.  Brrrrr!
1148338
The sun is about 15 million degrees C. at its core and about 11000 degrees C. on its surface. Way too hot for anyone to get anywhere close to it.
30315
Well absolute zero is -273.15 C or so, and we have gotten very close to that (within about a tenth of billionth of a degree C). We cannot get any colder than absolute 0. \n\nThere is such a thing as negative temperature, but this is not a case of something being colder than absolute zero, but "hotter than infinite temperature". See the attached web pages.
712667
The others set the problem up, but don't answer the question!? \n\nThe surface temperature answer for a star emitting twice the energy flux of the sun(Sol) is 6900 degrees K.
20979
Hottest Place:  El Azizia, Lybia (150 Degrees)\n\nColdest Place:  East Antartic Ice Sheet (-89.4 Degrees)
473273
temperature will rise depending on starting temperature, albedo(reflectivity), density, and probably lots of other factors, so there is no set answer.
266364
It's 4000 degrees C at the center of the Earth. That'd pretty much do the trick.
357280
There must be a maximum. As an object gets hotter and hotter the molecules vibrate faster and faster. They clearly cannot exceed the speed of light so there must be a maximum.