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Chemical Engineering :: Chemical Engineering Thermodynamics

  1. is the mathematical expression

  2. A.
    Joule-Thomson co-efficient.
    B.
    specific heat at constant pressure (Cp).
    C.
    co-efficient of thermal expansion.
    D.
    specific heat at constant volume (CV).

  3. In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when

  4. A.
    n = y = 1.4
    B.
    n = 0
    C.
    n = 1
    D.
    n = 1.66

  5. A liquid under pressure greater than its vapour pressure for the temperature involved is called a __________ liquid.

  6. A.
    subcooled
    B.
    saturated
    C.
    non-solidifiable
    D.
    none of these

  7. For a real gas, the chemical potential is given by

  8. A.
    RT dlnP
    B.
    RT dlnf
    C.
    R dlnf
    D.
    none of these

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

  10. A.
    heat capacity
    B.
    crystalline structure
    C.
    entropy
    D.
    none of these

  11. Lowering of condenser temperature (keeping the evaporator temperature constant) in case of vapour compression refrigeration system results in

  12. A.
    increased COP.
    B.
    same COP.
    C.
    decreased COP.
    D.
    increased or decreased COP ; depending upon the type of refrigerant.

  13. Pick out the correct statement.

  14. A.
    If an insoluble gas is passed through a volatile liquid placed in a perfectly insulated container, the temperature of the liquid will increase.
    B.
    A process is irreversible as long as Δ S for the system is greater than zero.
    C.
    The mechanical work done by a system is always equal to P.dV.
    D.
    The heat of formation of a compound is defined as the heat of reaction leading to the formation of the compound from its reactants.

  15. Grams of butane (C4H10) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be

  16. A.
    580
    B.
    640
    C.
    1160
    D.
    data insufficient; can't be computed

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

  18. 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.

  19. What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, TR(where, T1 and T2 are source & surrounding temperatures respectively.)?

  20. A.
    B.
    C.
    D.
    none of these