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- Dictionaryabsolute zero
noun
- 1. the lowest temperature that is theoretically possible, at which the motion of particles which constitutes heat would be minimal. It is zero on the Kelvin scale, equivalent to −273.15°C.
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Lowest limit of the thermodynamic temperature scale
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- 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.
en.wikipedia.org/wiki/Absolute_zero
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Absolute zero is the lowest limit of the thermodynamic temperature scale, defined as 0 kelvin or −273.15 °C. It is the state of matter with minimum vibrational motion and quantum mechanical zero-point energy, and cannot be reached by thermodynamic means.
- 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
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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.2013.12146Absolute zero is the lowest possible temperature for all substances, defined as the point where no more heat can be removed. Learn how absolute zero is measured in Kelvin, Celsius, and Fahrenheit, and what happens to matter at this temperature.
Sep 28, 2024 · Absolute zero is the lowest temperature possible, corresponding to −273.15 °C on the Celsius scale and −459.67 °F on the Fahrenheit scale. Learn how it was discovered, what it means for thermodynamics, and how it relates to the Kelvin scale.
- The Editors of Encyclopaedia Britannica
Feb 17, 2010 · Why is absolute zero (0 kelvin or −273.15°C) an impossible goal? Practically, the work needed to remove heat from a gas increases the colder you get, and an infinite amount of work would be ...
- Hazel Muir
Nov 27, 2019 · Absolute zero is the lowest possible temperature on the thermodynamic scale, where no more heat can be removed from a system. Learn how scientists have approached absolute zero, and what negative temperature means in physics.
- Anne Marie Helmenstine, Ph.D.
Absolute zero is the lowest possible temperature where heat energy is absent in a substance. Learn how gases behave at absolute zero, the formulas to convert between temperature scales, and the difference between absolute zero and zero point energy.
In one sense we can never know because reaching absolute zero is an impossible task as an infinite amount of work is required to cool something down that far. However you can get close – the world record coldest temperature is 0.0000000001°C above absolute zero.
