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Railways NTPC (Technical Ability) Thermodynamics Question Bank Thermodynamics

  • question_answer
         If a gas obeys Van-der Waals equation at the critical point, then what does \[\frac{R{{T}_{c}}}{{{P}_{c}}{{V}_{c}}}\] equal to?

    A) Zero                             

    B) unity              

    C) 1.50                             

    D) 2.67   

    Correct Answer: D

    Solution :

    \[\frac{R{{T}_{c}}}{{{p}_{c}}{{v}_{c}}}=\frac{8}{3}=2.67\]  


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