Home / Chemical Engineering / Chemical Engineering Thermodynamics :: Section-9

Chemical Engineering :: Chemical Engineering Thermodynamics

  1. The amount of heat required to decompose a compound into its elements is __________ the heat of formation of that compound from its elements.

  2. A.

     Less than

    B.

     More than

    C.

     Same as

    D.

     Not related to


  3. Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements.

  4. A.

     The same

    B.

     Less than

    C.

     Greater than

    D.

     Different than


  5. In case of the decomposition of hydroiodic acid (2HI ⇋ H₂ + I₂), addition of H₂ (at equilibrium condition) will

  6. A.

     Increase the partial pressure of I₂

    B.

     Decrease the partial pressure of HI

    C.

     Diminish the degree of dissociation of HI

    D.

     None of these


  7. __________ does not change during phase transformation processes like sublimation, melting & vaporisation.

  8. A.

     Entropy

    B.

     Gibbs free energy

    C.

     Internal energy

    D.

     All of the above


  9. Adiabatic compression of a saturated water vapour makes it

  10. A.

     Supersaturated

    B.

     Superheated

    C.

     Both A and B

    D.

     Neither A nor B


  11. Standard temperature and pressure (S.T.P.) is

  12. A.

     0°C and 750 mm Hg

    B.

     15°C and 750 mm Hg

    C.

     0°C and 1 kgf/cm²

    D.

     15°C and 1 kgf/cm²


  13. In case of an __________ process, the temperature of the system increases.

  14. A.

     Isothermal compression

    B.

     Isothermal expansion

    C.

     Adiabatic expansion

    D.

     Adiabatic compression


  15. In a turbine, the fluid expands almost

  16. A.

     Isothermally

    B.

     Isobarically

    C.

     Adiabatically

    D.

     None of these


  17. Specific/molar Gibbs free energy for a pure substance does not change during

  18. A.

     Sublimation

    B.

     Vaporisation

    C.

     Melting

    D.

     Either A, B or C


  19. 1st law of thermodynamics is nothing but the law of conservation of

  20. A.

     Momentum

    B.

     Mass

    C.

     Energy

    D.

     None of these