8. The exact differential equation of enthalpy can be expressed as below:dH=-uCpdp + C₂dT where C: constant pressure heat capacityu: Joule-Thomson coefficientμl=a) Derive the exact differential equation of enthalpy from the general exact differential equation ofenthalpy:= (3), dp + (7) drTdH =b) Considering that you use nitrogen gas to make a temperature drop to an isenthalpic system, howmuch pressure drop is required to cool the system by 20 K? The Joule-Thomson coefficient ofnitrogen is u 3 0.27 K atm¹.c) Prove that the Joule-Thomson expansion can occur without change of enthalpy (isenthalpicprocess).

The exact differential equation of enthalpy can be expressed as below: dH=-uCpdp + CdT where C: constant pressure heat capacity u: Joule-Thomson coefficient μl= H a) Derive the exact differential equation of enthalpy from the general exact differential equation of enthalpy: dp + (7) dr T dH= Р b) Considering that you use nitrogen gas to make a temperature drop to an isenthalpic system, how much pressure drop is required to cool the system by 20 K? The Joule-Thomson coefficient of nitrogen is µ = 0.27 K atm¹. c) Prove that the Joule-Thomson expansion can occur without change of enthalpy (isenthalpic process).

The exact differential equation of enthalpy can be expressed as below: dH=-uCpdp + CdT where C: constant pressure heat capacity u: Joule-Thomson coefficient μl= H a) Derive the exact differential equation of enthalpy from the general exact differential equation of enthalpy: dp + (7) dr T dH= Р b) Considering that you use nitrogen gas to make a temperature drop to an isenthalpic system, how much pressure drop is required to cool the system by 20 K? The Joule-Thomson coefficient of nitrogen is µ = 0.27 K atm¹. c) Prove that the Joule-Thomson expansion can occur without change of enthalpy (isenthalpic process).

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.19P

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