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  1. The compressibility factor of a gas is given by (where, V1 = actual volume of the gas V2 = gas volume predicted by ideal gas law )

  2. A.
    V1/V2
    B.
    V2/V1
    C.
    V1-V2
    D.
    V1.V2

  3. If we increase the pressure on a substance (which is at its triple point), then the triple point

  4. A.
    increases
    B.
    decreases
    C.
    remains unchanged
    D.
    may increase or decrease ; depends on the substance

  5. Free energy

  6. A.
    decreases in all spontaneous (or irreversible) processes.
    B.
    change during a spontaneous process has a negative value.
    C.
    remains unchanged in reversible processes carried at constant temperature and pressure.
    D.
    all (a), (b) and (c).

  7. "If different processes are used to bring about the same chemical reaction, the enthalpy change is same for all of them". This is __________ law.

  8. A.
    Hess's
    B.
    Kirchoff's
    C.
    Lavoisier and Laplace
    D.
    none of these

  9. Fugacity is a measure of the

  10. A.
    escaping tendencies of the same substance in different phases of a system.
    B.
    relative volatility of a mixture of two miscible liquids.
    C.
    behaviour of ideal gases.
    D.
    none of these.

  11. The quantitative effect of temperature on chemical equilibrium is given by the

  12. A.
    Vant-Hoff equation.
    B.
    Le-Chatelier's principle.
    C.
    Arhenius equation.
    D.
    none of these.

  13. For an irreversible process involving only pressure-volume work

  14. A.
    (dF)T, p <0
    B.
    (dF)T, p = 0
    C.
    (dF)T, p > 0
    D.
    (dA)T, v >0

  15. Ideal refrigeration cycle is

  16. A.
    same as Carnot cycle.
    B.
    same as reverse Carnot cycle.
    C.
    dependent on the refrigerant's properties.
    D.
    the least efficient of all refrigeration processes.

  17. The following heat engine produces power of 100000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is

  18. A.
    100, 000 kW
    B.
    160, 000 kW
    C.
    200, 000 kW
    D.
    320, 000 kW

  19. Refrigeration cycle

  20. A.
    violates second law of thermodynamics.
    B.
    involves transfer of heat from low temperature to high temperature.
    C.
    both (a) and (b).
    D.
    neither (a) nor (b).