JCECE Engineering JCECE Engineering Solved Paper-2014

  • question_answer
    The value of compression factor, \[Z\] for critical constants is

    A) \[\frac{1}{2}\]                                   

    B) \[\frac{3}{4}\]

    C) \[\frac{2}{3}\]                                   

    D)  \[\frac{3}{8}\]

    Correct Answer: D

    Solution :

    We know\[{{p}_{c}}=\frac{a}{27{{b}^{2}}},\,\,{{V}_{c}}=3b\] and        \[{{T}_{c}}=\frac{8a}{27Rb}\]                 \[\frac{{{p}_{c}}{{V}_{c}}}{{{T}_{c}}}=\frac{a\times 3b\times 27Rb}{27{{b}^{2}}\times 8a}=\frac{3}{8}R\]                 \[\frac{{{p}_{c}}{{V}_{c}}}{R{{T}_{c}}}=\frac{3}{8}\] Compression factor,\[z=\frac{pV}{RT}=\frac{{{p}_{c}}{{V}_{c}}}{R{{T}_{c}}}=\frac{3}{8}\]


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