Why temperature of absolute zero is -273,15celsius ?

Answer 1

Your question touches on several aspects of thermodynamics. The simple answer is that the Celsius scale was developed prior to the Kelvin scale. The Kelvin scale was chosen to have the same spacing between units as the Celsius scale, which made it compatible when dealing with temperature differences.
For a long time, people believed there must be some minimum temperature - they just tried to reach it experimentally. Guillaume Amontons suggested that there could not be negative pressures and hence there must be some minimum temperature, because gases cool as they are expanded.
Kelvin's discovery of the value, based on consideration of Carnot principles and lots of experimental data, is remarkable in my opinion.

Answer 2

That equates to 0 K.

Temperature is a physical quantity which gives us an idea of how hot or cold an object is. The temperature of an object depends on how fast the atoms and molecules which make up the object can shake, or oscillate. As an object is cooled, the oscillations of its atoms and molecules slow down. For example, as water cools, the slowing oscillations of the molecules allow the water to freeze into ice. In all materials, a point is eventually reached at which all oscillations are the slowest they can possibly be. The temperature which corresponds to this point is called absolute zero. Note that the oscillations never come to a complete stop, even at absolute zero.

Absolute zero is the point on the thermodynamic (absolute) temperature scale where the heat energy is at a minimum, that is, no more heat can be removed from the system. According to classical physics this temperature would correspond to zero kinetic energy of the particles of the system, in the reference frame of the system's center of mass; this, however, is now known to be false—quantum mechanics explains why the energy of a system can never drop below its zero-point energy.

Answer 3

The Kelvin scale was developed so that zero was at -273 degrees Celsius so that the Ideal gas Law could work...Math disappears every time a zero shows up so they had to make sure no zeros could put there selves into the mix. so they made a zero at the very coldest temperature theoretically possible instead of just at the freezing point of water, which is very warm compared to a great many other things. Makes sense really, but it isn't very useful in a real world that revolves around water and weather.

Answer 4

Absolute zero is the temperature at which all elements are solids - ie the freezing point of all elements. This is useful because certain formulae i physics need temperatures in absolute zero - eg the pressure/volume of gas at different temperatures. Celsius - using a freezing point of water - is useful for certain things as well, so to make things interoperable Absolute zero is uses the same temperature difference between degrees as Celsius, except that 0K is absoloute zero.

Answer 5

The Kelvin scale was developed to start from 0 at the coldest point that anything could be. On th Kelvin scale, each degree is equivalent to 1 degree on the Centigrade/Celcius scale.

The Centigrade/Celcius scale was developed on the basis that water froze (became solid) at 0 degrees, and boiled (became a gas) at 100 degrees, thus working well with the decimal based system, and being adopted for SI units.

So absolute zero is a term that relates to the Kelvin scale, and -273.15 (or thereabouts) is the equivalent in Centigrade/Celcius/SI units.

Hope this helps.

damoleeds

Answer 6

Do the electrons in a atom whose temp is taken to -273.15 celsius stop spinning, I don't think so.

Friction creates heat, light creates heat and electricity also.

How can you use a temperature testing device to determine absolute zero, surely it can only determine the presence or absence of the three things stated above and I don't believe all three of these things are ever totally absent.

Absolute zero is relative in my opinion.

Answer 7

Because the celsius scale was chosen to have 0 as the freezing point of water and 100 as the boiling point of water (both at sea level). Since absolute zero is less than the freezing point of water, it has to be a negative number, and since it is a fundamental physical constant unrelated to the freezing point of water, it's not a round number - it just happens to be -273.15. Hope this helps.

Answer 8

That's just the way the world is.

At that temperature all kinetic motion in the particles comprising matter ceases and they are at complete rest.

And jimdan2000's answer isn't right. The Kelvin Scale doesn't stop at 273.

For example water boils at 373.1339 K

Answer 9

because that is the lowest temperature that can be acheived it cant go below that also the other fact is. At absolute zero u get the fourth stage of matter plasma.

Answer 10

demanding to declare yet I doubt it. Why? because of fact if it became Al Qaeda, the Mainstream Media Propaganda gadget would be showing photos of them dancing interior the streets like they did after 9-11. No, with only 3 killed, that's totally almost a non-incident. The Media's interest is to make it appear like something extensive so Obama can crank up thoughts an ban stress cookers. all of us understand stress cookers are utilized by using survivalists to maintain nutrition for use after Obama collapses the observe's economies. Yep. yet another nutty theory has been created.