Why is there absolute zero, and why can t absolute zero be reached?

Absolute Zero Absolute zero represents a temperature at which all the molecules and atoms that make up matter cease to move. Motion refers to all spatial, mechanical, molecular, and vibrational motions, including some forms of electronic motion, but it does not include "zero-point motion" in the concept of quantum mechanics. This motion cannot be stopped unless the agglomeration system of the moving particles is dismantled.

By the nature of this definition, absolute zero is impossible to achieve in any experiment, but low temperatures within one millionth of a degree above absolute zero have been reached. All these molecular and atomic movements that take place inside matter are collectively known as "thermal motions", which are invisible to the naked eye, but we will see that they determine most of the temperature-dependent properties of matter. Just as a straight line is made up of only two points, a temperature scale is defined by two fixed and repeatable temperatures.

Originally, at a standard atmosphere (760 mm mercury, or 760 Torr), the Celsius temperature scale was set at the melting point of ice to be 0 and the boiling point of water to be 100, and the absolute temperature scale was to set absolute zero to ok and ice to have a melting point of 273 k, so that there were three fixed points that caused the temperature to be inconsistent, because scientists wanted the degrees of the two temperature scales to be equal, so whenever an accurate experiment was carried out on the relationship between the three points, the value of one of the points was always changed by one hundredth degree. Today, apart from absolute zero, there is only one fixed point that is internationally recognized, and that is the "triple point" of water. In 1948 it was determined that it was 273 degrees above absolute zero and 16 degrees.

When the vapor pressure is equal to one atmosphere, the normal freezing point of water is slightly lower, which is 273 15K (o 320°F), and the normal boiling point of water is. The actual values of these fixed points in Celsius scales and some other minor reference points for temperature measurement (the so-called International Practical Temperature Scale), as well as the measurement methods used in laboratories to obtain these values accurately, are regularly published by the International Weighting Committee. The temperature of an object is actually the movement of atoms inside the object.

When we feel that an object is hot, it means that its atoms are moving fast: when we feel that an object is cold, it means that the atoms inside it are moving slowly. Our bodies sense this movement through heat or cold, while physicists measure temperature on the absolute temperature scale, or Kelvin temperature scale.

Absolute temperature zero (0k) is equivalent to minus zero degrees Celsius (known as "absolute zero", the lowest possible temperature in nature). At absolute zero, the motion of the atoms stops completely, and theoretically, the volume of the gas should be zero. But it is impossible for the temperature to fall below this scale, or even to reach this scale, but only to approach it.

Why absolute zero can't be reached is as follows:

The reason why absolute zero cannot be reached: when the motion of the particle is stationary, the kinetic energy becomes zero, and the thermal energy is also zero, but the kinetic energy, potential energy cannot become negative, so absolute zero is the lowest value of temperature.

Absolute zero is the lowest temperature in thermodynamics, but only a theoretical lower limit. The unit of the thermodynamic temperature scale is Kelvin (k), and absolute zero is the zero point defined by the Kelvin temperature scale (referred to as the Kelvin temperature scale, denoted as k).

0k is approximately equal to minus degrees Celsius on the temperature scale, which is 0 degrees Kelvin, at this temperature, the molecules of the object have no kinetic energy and potential energy, and the kinetic potential energy is 0, so the internal energy of the object is 0 at this time. The temperature of a substance depends on the kinetic energy of the atoms, molecules, etc. within it. According to the Maxwell Boltzmann distribution, the greater the kinetic energy of the particle, the higher the temperature of the matter.

Theoretically, if the kinetic energy of a particle is as low as the lowest point of quantum mechanics, the matter reaches absolute zero and cannot be lower. However, absolute zero is the lowest temperature that cannot be reached, and the temperature in nature can only be approximated infinitely.

If it arrives, then everything will reach the lowest form of motion. Because any space must contain energy and heat, and they are constantly converting into each other without disappearing. So absolute zero does not exist unless the space is free of any energy heat from the beginning.

At absolute zero, atoms and molecules possess the minimum amount of energy allowed by quantum theory.

Vacuum energy: At absolute zero, any energy should disappear. But even at absolute zero, there is still an energy that exists, which is the vacuum zero point energy.

Vacuum zero-point energy, named after the vibration of particles found at absolute zero. This is the huge background energy contained in the quantum vacuum. Heisenberg's uncertainty principle states:

It is not possible to know the position and momentum of a particle at the same time with a high degree of accuracy. Therefore, when the temperature drops to absolute zero, the particles must still be vibrating; Otherwise, if the particle comes to a complete stop, its momentum and position can be accurately measured at the same time, which is contrary to the principle of inaccuracy.

Absolute zero refers to the lowest temperature defined in thermodynamics and is also the zero point temperature as defined by the Kelvin temperature scale, where the temperature of the absolute temperature scale is degrees Celsius. In quantum mechanics, absolute zero refers to the temperature of matter when the kinetic energy of the particle reaches the lowest point, but absolute zero is only the lower limit value in theory, and it mainly depends on the temperature of the substance and the kinetic energy of the particle.

The absolute zero point of an ideal gas can also be learned in physics, the absolute temperature is related to the laws followed by the ideal gas, and it also has an ideal gas equation of state, in this science, the kinetic energy of the ideal gas molecule is determined by the temperature, that is to say, the absolute zero can also be used as the temperature of the object molecule when the ideal gas molecule stops moving. But this is all ideal reasoning, in fact, when the temperature of the gas is close to absolute zero, the quantum properties of the gas will change the state of the gas, and the motion of molecules no longer follows the physical laws of gas thermodynamics.

Absolute zero as a function of particle velocity. Under the condition of absolute zero, the motion of nearby matter stops, but in reality in the experiment can not reach the true absolute zero, only the absolute zero can be seen in the temperature of the matter related to the linear graph, according to such a legend can be studied and calculated under the condition of absolute zero particle velocity, the study of Planck's constant correlation theory found that the particle has a certain uncertainty in both speed and position, which means that under the condition of absolute zero, the velocity of the particle is zero, but on the contrary, The motion of particles cannot be stopped, so absolute zero cannot be reached.

There is a place called the "Pullback Stick Nebula", which is the coldest place in the universe discovered by astronomers, and the temperature of this place is minus 272, commonly known as the "cosmic ice box". It is found that the temperature of the "Pullback Bar Nebula" is close to absolute zero, which shows that there is still the possibility of absolute zero in the universe, which also shows that the big ** theory in the theory of the origin of the universe has a certain basis.

It should be about or . At this temperature, all particles lose their heat energy and the atoms stop moving, which is called absolute zero.

This refers to sub-zero, which is very low, and is only known as absolute 0 degrees.

It's sub-zero. Represents a temperature at which all the substances that are made up as well as all the molecules cease to move.

0 degrees refers to the lowest temperature. And so it is. Poison frozen. case.

I don't think there is an absolute 0 degree, because there will be a certain deviation to a certain extent, so it will be difficult to achieve absolute 0 degrees.