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. This equates tae −459.67° on the Fahrenheit scale an 0 R on the Rankine scale. Scientists hae achieved temperaturs extremely close tae absolute zero, whaur matter exhibits quantum effects such as superconductivity an superfluidity.
References[eedit | eedit soorce]
- "Unit of thermodynamic temperature (kelvin)". SI Brochure, 8th edition. Bureau International des Poids et Mesures. 13 March 2010 1967. pp. Section 18.104.22.168. Note: The triple point of water is 0.01 °C, not 0 °C; thus 0 K is −273.15 °C, not −273.16 °C.
- Arora, C. P. (2001). Thermodynamics. Tata McGraw-Hill. p. Table 2.4 page 43. ISBN 0-07-462014-2.
- Zielinski, Sarah (1 January 2008). "Absolute Zero". Smithsonian Institution. Retrieved 2012-01-26.