Why there cannot be negative temperature in Kelvin scale?

Answer 1

Actually, the Kelvin temperature can be negative. However, this does not mean the object is cooler than absolute zero, it actually means that it is "hotter than infinity"

This is done by using strong magnetic fields to influence the spin of atoms and creating a state where increased heat energy means decreased entropy. Since absolute zero, or 0 K is the point of lowest entropy and increasing heat energy corresponds to increasing temperature, the only way for this to make sense is to have negative kelvin temperature since then it would increase to zero.

Answer 2

Gaseous hydrogen is the material used in a standard thermometer.

The pressure ‘p’ of the gas is used to measure the temperature.

If p0 is the pressure of the gas at 0 degree centigrade ( melting point of ice) and p100 is the pressure of the gas at 100 degree centigrade ( boiling point of water) and p is the pressure of gas at an arbitrary temperature t, then the temperature t is given by the equation

t = {(p-p0) / (p100 - p0)} x 100.

When the temperature is decreased, the pressure of the gas is decreased.

At one temperature the pressure of the gas must become equal to zero.

The molecules loose all their kinetic energies, they become motionless; they do not exert pressure on the wall of the container; the gas pressure becomes zero.

From the above equation one can calculate the temperature at which the pressure becomes zero.

It was found to be - 273.1 degree centigrade.

If we take this temperature as zero kelvin then the temperature of ice becomes 273.1 kelvin and so on.

Now, below this temperature (-273.1 degree centigrade or 0 kelvin), what will be the pressure of the gas? Will there be any negative pressure?

Thus this is the lowest temperature possible.

Answer 3

The Kelvin scale is predicated on the seen Absolute 0- the temperature at which all atomic interest stops. because of fact it theoretically isn't possible to get less warm than that, there could be no temperature below absolute 0.

Answer 4

Absolute zero (zero Kelvin) means that there is no energy left. To get to negative Kelvin, you'd have to have such a thing as negative energy, which does not exist, except in new age mumbo jumbo.

Answer 5

Absolute Zero is the temperature at which a heat pump doesn't dump heat to the cold reservoir. A negative temperature would imply getting energy out of nowhere.

Answer 6

Temperature is not just a matter of measuring how hot a body is. It is actually a scale for the ability of a body to absorb or to transfer energy to another.
At absolute zero temperature, all molecules of a body stopped to move. The change in entropy is zero therefore.

Answer 7

To underscore what knowledgeable respondants have said, and to advise caution in considering Vincent G's uninformed response, "negative energy" is not "new age mumbo jumbo." The concept of negative energy was introduced by the Physicist Paul Dirac in 1930, as described in this Wikipedia article:

"The Dirac sea is a theoretical model of the vacuum as an infinite sea of particles possessing negative energy. It was invented by the British physicist Paul Dirac in 1930 to explain the anomalous negative-energy quantum states predicted by the Dirac equation for relativistic electrons. The positron, the antimatter counterpart of the electron, was originally conceived of as a hole in the Dirac sea, well before its experimental discovery in 1932."

Hope this helps. The rest of the article and its links are cool. Check it out at the link below.

Have a good one and keep asking excellent questions like this one!

Answer 8

e^x is correct: there can be. Temperature is a statistical-mechanical concept, which measures the change in the number of accessible states with the amount of energy in the system. In a spin system, higher energy means more alignment, which means less disorder and fewer microscopic states. This means a negative rate of change with increasing energy, which means a negative temperature.

Answer 9

because the kelvin scale begins at zero. it isn't really any more complicated than that. it has nothing to do with energy or anything else. it is simply where the scale was started

Answer 10

Kelvin temperature cannot be zero because.
According to Charles law the volume of an enclosed mass of dry gas is directly propositional to its absolute/kelvin temperature. According to this law if there is any change in volume then there must be an change in kelvin/absolute temperature.
If the volume of an enclosed mass of dry gas is reduced to 0 then the temperature also reduces to 0K (-273°C). If the volume is further reduced then it becomes negative and the temperature will also become negative. But under any circumstances the volume of an enclosed mass of can never be negative. Similarly the kelvin temperature of an enclosed mass of dry gas can never be negative.