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Discussion :: Chemical Engineering Thermodynamics

  1. Gases are cooled in Joule-Thomson expansion, when it is __________ inversion temperature.

    2. A.

     Below
    B.

     At
    C.

     Above
    D.

     Either B or C

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    Answer : Option A

    Explanation :

    Above the inversion temperature joule-thomson coefficient {\left( {\frac{{\partial T}}{{\partial P}}} \right)_H} = - ve
    So, by throttling (decreasing the pressure) the temperature increases and hence heating.
    Below the inversion temperature houle-thomson coefficient {\left( {\frac{{\partial T}}{{\partial P}}} \right)_H} = + ve
    So,by throttling the temperature decreases hence cooling.

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