Absolute zero pressure takes place _____________________?
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Answer: C. when molecular momentum of the system becomes zero
Explanation
Pressure in a gas is caused by molecular collisions against container walls transferring momentum. When temperature drops to absolute zero, molecular thermal motion and associated momentum completely cease. Without any molecular momentum to exert force, the system pressure drops to its absolute zero point. Kinetic theory of gases relates macroscopic pressure directly to the microscopic momentum of molecules. Absolute zero temperature corresponds to minus 273.15 degrees Celsius where thermal energy reaches a minimum. Real gases liquefy and solidify before reaching absolute zero, making this state a theoretical limit.
Cryogenic engineering and astrophysics study behavior near absolute zero to understand quantum fluid properties. Ideal gas law extrapolations intersect the zero pressure and zero temperature axis at this theoretical limit. Low-temperature physics research relies on understanding molecular motion cessation for superconductor development. Sea level atmospheric pressure is a standard reference point equal to one hundred one kilopascals. Center of the earth conditions involve extreme gravitational pressures rather than absolute zero pressure. Minus 273 Kelvin is physically impossible because Kelvin temperature scales cannot have negative values.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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