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Nitrogen can be liquefied using a Joule-Thomson expansioni process. This is done by rapidlyl and adiabatically...

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Mechanical Engineering

Nitrogen can be liquefied using a Joule-Thomson expansioniprocess. This is done by rapidlyl and adiabatically expandign coldnitrogen gas from high pressure to a low pressure. If nitrogen at135 K and 20 MPa undergoes a Joule-Thomson expansion to 0.4MPa,

a. Estimate the fraction of vapor and liquid present after theexpansion, and the emperature of this mixture using thepressure-enthalpy diagram for nitrogen.

b. Repeat the calculation assuming nitrogen to be an ideal gaswith Cp* = 29.3 J/molK

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