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Chemical Engineering :: Chemical Engineering Thermodynamics

  1. In jet refrigerators, the refrigerating fluid is practically always

  2. A.

     Water

    B.

     Ammonia

    C.

     Freon

    D.

     Brine


  3. In the reaction; N₂ + O₂ ⇋ 2NO, increasing the pressure will result in

  4. A.

     Shifting the equilibrium towards right

    B.

     Shifting the equilibrium towards left

    C.

     No change in equilibrium condition

    D.

     None of these


  5. Number of degrees of freedom for a three phase system in equilibrium comprising of three non-reacting chemical species is

  6. A.

     2

    B.

     0

    C.

     1

    D.

     3


  7. Gibbs-Duhem equation relates composition in liquid phase and the __________ at constant temperature & pressure.

  8. A.

     Fugacity

    B.

     Partial pressure

    C.

     Activity co-efficient

    D.

     A, B, and C


  9. For multicomponent multiple phases to be in equilibrium at the same pressure and temperature, the __________ of each component must be same in all phases.

  10. A.

     Chemical potential

    B.

     Fugacity

    C.

     Both A and B

    D.

     Neither A nor B


  11. Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The reatio of chemical potential to free energy of a pure substance at oconstant temperature and pressure is

  12. A.

     0

    B.

     1

    C.

     ∞

    D.

     None of these


  13. One ton of refrigeration capacity is equivalent to the heat removal rate of

  14. A.

     50 k cal/hr

    B.

     200 BTU/hr

    C.

     200 BTU/minute

    D.

     200 BTU/day


  15. Internal energy of an ideal gas

  16. A.

     Increases with increase in pressure

    B.

     Decreases with increase in temperature

    C.

     Is independent of temperature

    D.

     None of these


  17. In an ideal refrigeration cycle, the change in internal energy of the fluid is

  18. A.

     +ve

    B.

     -ve

    C.

     0

    D.

     Either of the above three ; depends on the nature of refrigerant


  19. In a reversible chemical reaction (where, Δx = number of moles of products-number of moles of reactants )

  20. A.

     Addition of inert gas favours the forward reaction, when Δx is positive

    B.

     Pressure has no effect on equilibrium, when Δn = 0

    C.

     Addition of inert gas has no effect on the equilibrium constant at constant volume for any value of Δx (+ ve, - ve) or zero)

    D.

     All of the above