What Happens at Absolute Zero Temperature?

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SUMMARY

Absolute zero temperature, defined as 0 Kelvin or -273.15 degrees Celsius, is the point at which a reversible isothermal process does not involve heat exchange. At this temperature, according to the Ideal Gas Law (PV = nRT), both pressure (P) and volume (V) approach zero. However, it is essential to note that while the pressure exerted by gas molecules in a container may be negligible, the molecules themselves occupy a finite volume due to their physical dimensions. This indicates that gases do not completely vanish at absolute zero but rather exhibit unique quantum behaviors.

PREREQUISITES
  • Understanding of thermodynamics and the laws of thermodynamics
  • Familiarity with the Ideal Gas Law (PV = nRT)
  • Basic knowledge of molecular physics and atomic structure
  • Concept of reversible isothermal processes
NEXT STEPS
  • Research the implications of quantum mechanics at absolute zero temperature
  • Study the behavior of gases under extreme conditions, including low temperatures
  • Explore the concept of Bose-Einstein condensates and their relation to absolute zero
  • Investigate the practical applications of cryogenics in scientific research
USEFUL FOR

Physicists, thermodynamics students, researchers in low-temperature physics, and anyone interested in the fundamental principles of gas behavior at extreme temperatures.

Amith2006
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Sir,
Absolute zero temperature is defined as the temperature at which a reversible isothermal process does not involve exchange of heat. Can you please explain this to me? :confused: Also it is said that at absolute zero temperature the pressure and volume of a gas is zero. How is it possible?
 
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From the Ideal Gas Law, PV = nRT, you know that if T is zero so must be the product of P and V. I would argue to say that the pressure exerted by the gas on the container is zero.

Actually, it MUST occupy some volume. The individual molecules themselves are of some definite (although small) dimensions.
 

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