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Chemical Engineering :: Chemical Engineering Thermodynamics

  1. At absolute zero temperature, all substances have the same

  2. A.

     Heat capacity

    B.

     Crystalline structure

    C.

     Entropy

    D.

     None of these


  3. The expression, ΔG = nRT .In P₂/P₁ , gives the free energy change

  4. A.

     With pressure changes at constant temperature

    B.

     Under reversible isothermal volume change

    C.

     During heating of an ideal gas

    D.

     During cooling of an ideal gas


  5. The thermodynamic law, PVy = constant, is not applicable in case of

  6. A.

     Ideal compression of air

    B.

     Free expansion of an ideal gas

    C.

     Adiabatic expansion of steam in a turbine

    D.

     Adiabatic compression of a perfect gas


  7. Entropy change of the reaction, H₂O(liquid) H₂O(gas), is termed as the enthalpy of

  8. A.

     Solution

    B.

     Vaporisation

    C.

     Formation

    D.

     Formation


  9. Specific __________ does not change during a phase change (e.g. sublimation, melting, vaporisation etc.).

  10. A.

     Entropy

    B.

     Internal energy

    C.

     Enthalpy

    D.

     Gibbs free energy


  11. For an ideal gas, the activity co-efficient is

  12. A.

     Directly proportional to pressure

    B.

     Inversely proportional to pressure

    C.

     Unity at all pressures

    D.

     None of these


  13. For an isothermal process, the internal energy of a gas

  14. A.

     Increases

    B.

     Decreases

    C.

     Remains unchanged

    D.

     Data insufficient, can't be predicted


  15. If two gases have same reduced temperature and reduced pressure, then they will have the same

  16. A.

     Volume

    B.

     Mass

    C.

     Critical temperature

    D.

     None of these


  17. Gibbs phase rule finds application, when heat transfer occurs by

  18. A.

     Conduction

    B.

     Convection

    C.

     Radiation

    D.

     Condensation


  19. There is a change in __________ during the phase transition.

  20. A.

     Volume

    B.

     Pressure

    C.

     Temperature

    D.

     All of the above