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Sep 28, 2024 · absolute zero, temperature at which a thermodynamic system has the lowest energy. It corresponds to −273.15 °C on the Celsius temperature scale and to −459.67 °F on the Fahrenheit temperature scale.
- The Editors of Encyclopaedia Britannica
Zero kelvin (−273.15 °C) is defined as absolute zero. Absolute zero is the lowest limit of the thermodynamic temperature scale; a state at which the enthalpy and entropy of a cooled ideal gas reach their minimum value.
- Absolute Zero in Kelvin, Celsius, and Fahrenheit
- How Absolute Zero Works
- Can We Ever Reach Absolute Zero?
- Coldest Temperature Ever Recorded
- Negative Kelvin Temperature
- References
Absolute zero is 0 K, -273.15 °C, or -459.67 °F. Note the Kelvin temperature does not have a degree symbol. This is because the Kelvin scale is an absolute scale, while the Celsius and Fahrenheit scales are relative scales based on the freezing point of water.
One common misconception about absolute zero is that matter stops moving or freezes into place. Theoretically, absolute zero is the lowest possible temperature, but it isn’t the lowest possible enthalpy state. This is because absolute zero is defined for an ideal gas. At very low temperatures, real matter deviates from ideal gas behavior. At absolu...
According to the laws of thermodynamics, it is not possible to reach absolute zero only using thermodynamic methods. We can get very, very close to absolute zero, but can’t ever quite reach it, thanks largely to the Heisenberg Uncertainty Principle. For any particle, you can’t know its momentum and exact position. At absolute zero, the momentum is ...
It may surprise you to learn the coldest temperatures ever recorded were produced in labs here on Earth. Because of background radiation, deep space isn’t really all that cold (2.73 K). So far, the Boomerang nebula is the coldest place in nature, with a temperature of about 1 K.
While we can’t reach absolute zero, in 2013 researchers made a quantum gas of potassium atoms that achieved negative Kelvin temperatures in terms of motion degrees of freedom. Although it’s counter-intuitive, negative temperatures aren’t actually colder than absolute zero. In fact, they might be considered infinitely hotter than a positive temperat...
Arora, C. P. (2001). Thermodynamics. Tata McGraw-Hill. ISBN 978-0-07-462014-4.Medley, Patrick, et al. (May 2011). “Spin Gradient Demagnetization Cooling of Ultracold Atoms.” Physical Review Letters. 106. doi.org/10.1103/PhysRevLett.106.195301Merali, Zeeya (2013). “Quantum Gas Goes Below Absolute Zero.” Nature. doi:10.1038/nature.2013.12146Oct 11, 2024 · The meaning of ABSOLUTE ZERO is a theoretical temperature characterized by complete absence of heat and motion and equivalent to exactly —273.15°C or —459.67°F.
Nov 15, 2019 · Nothing in the universe — or in a lab — has ever reached absolute zero as far as we know. Even space has a background temperature of 2.7 kelvins. But we do now have a precise number for it: -459.67 Fahrenheit, or -273.15 degrees Celsius, both of which equal 0 kelvin.
- Stephen Ornes
the temperature that scientists believe is the lowest possible and at which all molecules (= smallest units of a substance) stop moving. (Definition of absolute zero from the Cambridge Academic Content Dictionary © Cambridge University Press) Examples of absolute zero. absolute zero.
Nov 27, 2019 · Absolute zero is defined as the point where no more heat can be removed from a system, according to the absolute or thermodynamic temperature scale. This corresponds to zero Kelvin, or minus 273.15 C. This is zero on the Rankine scale and minus 459.67 F.
