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Discussion :: Chemical Engineering Thermodynamics

  1. Fugacity and pressure are numerically equal, when the gas is

    2. A.

     In standard state
    B.

     At high pressure
    C.

     At low temperature
    D.

     In ideal state

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    Answer : Option D

    Explanation :

    We know the concept of fugacity is originated from the equation dμi=pdv−sdT    for an pure gas.
    Under constant temperature and assuming an ideal gas we can write this as dμ=RTdlnP    and for an real gas the same equation is assumed keeping all the non-ideality in the term fugacity and written as dμ=RTdlnf
    So, we can say for an ideal gas f=p.

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