Absolute zero

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Absolute zero is defined tae be −273.15°C, or 0 K.

Absolute zero is the lawest temperatur possible. Mair formally, it is the temperatur at which entropy reaches its minimum value. The laws o thermodynamics state that absolute zero cannae be reached uisin anly thermodynamic means. A seestem at absolute zero still possesses quantum mechanical zero-pynt energy, the energy o its grund state. The kinetic energy o the ground state cannae be removed.

The zero pynt o ony thermodynamic temperatur scale, such as Kelvin or Rankine scale, is set at absolute zero. Bi internaitional agreement, absolute zero is defined as 0K on the Kelvin scale an as −273.15° on the Celsius scale.[1][2] This equates tae −459.67° on the Fahrenheit scale[3] an 0 R on the Rankine scale.[2] Scientists hae achieved temperaturs extremely close tae absolute zero, whaur matter exhibits quantum effects such as superconductivity an superfluidity.

References[eedit | eedit soorce]

  1. "Unit of thermodynamic temperature (kelvin)". SI Brochure, 8th edition. Bureau International des Poids et Mesures. 13 March 2010 1967. pp. Section  Check date values in: |date= (help) Note: The triple point of water is 0.01 °C, not 0 °C; thus 0 K is −273.15 °C, not −273.16 °C.
  2. 2.0 2.1 Arora, C. P. (2001). Thermodynamics. Tata McGraw-Hill. p. Table 2.4 page 43. ISBN 0-07-462014-2. 
  3. Zielinski, Sarah (1 January 2008). "Absolute Zero". Smithsonian Institution. Retrieved 2012-01-26.