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Chemical Engineering :: Chemical Engineering Thermodynamics

  1. Joule-Thomson experiment is

  2. A.
    isobaric
    B.
    adiabatic
    C.
    isenthalpic
    D.
    both(b) & (c)

  3. Boyle's law for gases states that

  4. A.
    , when temperature is constant.
    B.
    , when temperature & mass of the gas remain constant.
    C.
    P ∝ V, at constant temperature & mass of the gas.
    D.
    = constant, for any gas.

  5. 1st law of thermodynamics is nothing but the law of conservation of

  6. A.
    momentum
    B.
    mass
    C.
    energy
    D.
    none of these

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

  8. 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 'a', 'b' & 'c'.

  9. Out of the following refrigeration cycles, which one has maximum COP ?

  10. A.
    Air cycle
    B.
    Carnot cycle
    C.
    Ordinary vapor compression cycle
    D.
    Vapor compression with a reversible expansion engine

  11. Pick out the correct statement:

  12. A.
    In an isothermal system, irreversible work is more than reversible work.
    B.
    Under reversible conditions, the adiabatic work is less than isothermal work.
    C.
    Heat, work, enthalpy and entropy are all 'state functions'.
    D.
    Matter and energy can not be exchanged with the surroundings in a closed system.

  13. In any spontaneous process,

  14. A.
    only F decreases
    B.
    only A decreases
    C.
    both F and A decreases
    D.
    both F and A increase

  15. Which of the following is a thermodynamic property of a system ?

  16. A.
    Concentration
    B.
    Mass
    C.
    Temperature
    D.
    Entropy

  17. Equilibrium constant decreases as the temperature

  18. A.
    increases, for an exothermic reaction.
    B.
    decreases, for an exothermic reaction.
    C.
    increases, for an endothermic reaction.
    D.
    none of these.

  19. The expression, , gives the free energy change

  20. 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.