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Chemical Engineering :: Chemical Engineering Thermodynamics

  1. What happens in a reversible adiabatic expansion process?

  2. A.

     Heating takes place

    B.

     Cooling takes place

    C.

     Pressure is constant

    D.

     Temperature is constant


  3. Which of the following is affected by the temperature?

  4. A.

     Fugacity

    B.

     Activity co-efficient

    C.

     Free energy

    D.

     All of the above


  5. Which is an example of closed system?

  6. A.

     Air compressor

    B.

     Lquid cooling system of an automobile

    C.

     Boiler

    D.

     None of these


  7. Entropy of an ideal gas depends upon its

  8. A.

     Pressure

    B.

     Temperature

    C.

     Both A & B

    D.

     Neither A nor B


  9. At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by(where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.)

  10. A.

     μ° + RT ln f

    B.

     μ°+ R lnf

    C.

     μ° + T lnf

    D.

     μ° + R/T lnf


  11. Partial molal quantities are important in the study of

  12. A.

     Ideal gases

    B.

     Ideal solutions

    C.

     Non-ideal mixtures

    D.

     A pure component


  13. For organic compounds, group contribution method can be used for the estimation of

  14. A.

     Critical properties

    B.

     Specific gravity

    C.

     Specific volume

    D.

     Thermal conductivity


  15. The efficiency of a Carnot heat engine operating between absolute temperatures T₁ and T₂ (when, T₁ > T₂) is given by (T₁ - T₂)/T₁. The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T₁ and T₂ is given by

  16. A.

     T₁/(T₁-T₂)

    B.

     T₂/(T₁-T₂)

    C.

     T₁/T₂

    D.

     T₂/R1


  17. Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.

  18. A.

     0

    B.

     273

    C.

     25

    D.

     None of these


  19. At the critical point of a substance

  20. A.

     The surface tension vanishes

    B.

     Liquid and vapour have the same density

    C.

     There is no distinction between liquid and vapour phases

    D.

     All of the above