Термодинамическая температура

[tatyana_tatyana 0]

Добрый день, помогите найти информации о новом определении Кельвина, а именно через постоянную Больцмана.

[jballa 69]

Добрый день, помогите найти информации о новом определении Кельвина, а именно через постоянную Больцмана.

The definition of the kelvin will undergo a fundamental change if the proposal is accepted. Rather than using the triple point of water to fix the temperature scale the proposal recommends that the energy equivalent as given by Boltzmann's equation be used.

Current definition: The kelvin, unit of thermodynamic temperature, is the fraction 1/273.16 of the thermodynamic temperature of the triple point of water.

Proposed definition: The kelvin, K, is the unit of thermodynamic temperature; its magnitude is set by fixing the numerical value of the Boltzmann constant to be equal to exactly 1.38065X×10−23 when it is expressed in the unit s−2·m2·kg·K−1, which is equal to J·K−1.

For a physical interpretation of this new definition, consider an ideal gas concentrated such that the average volume per molecule is 1.38065X×10−23 m3. That is the volume of a cube with a side length of about 24 nm. The ratio of the gas's temperature and pressure would be defined exactly equal to 1 K/Pa.

One consequence of this change is that the new definition makes the definition of the kelvin depend on the definitions of the second, the metre, and the kilogram.

http://en.wikipedia.org/wiki/Proposed_redefinition_of_SI_base_units#Kelvin