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Chemical Engineering :: Chemical Engineering Thermodynamics

  1. A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect ?

  2. A.
    Vapor compression cycle using expansion valve.
    B.
    Air refrigeration cycle.
    C.
    Vapor compression cycle using expansion engine.
    D.
    Carnot refrigeration cycle.

  3. __________ increases with increase in pressure.

  4. A.
    The melting point of wax
    B.
    The boiling point of a liquid
    C.
    both (a) and (b)
    D.
    neither (a) nor (b)

  5. A refrigerator may be termed as a

  6. A.
    heat pump
    B.
    heat engine
    C.
    Carnot engine
    D.
    none of these

  7. For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases.

  8. A.
    decreases
    B.
    increases
    C.
    remains same
    D.
    decreases linearly

  9. Which of the following is not an intensive property ?

  10. A.
    Chemical potential
    B.
    Surface tension
    C.
    Heat capacity
    D.
    None of these

  11. Out of the following refrigration cycles, which one has the minimum COP (Co-efficient of performance)?

  12. A.
    Air cycle
    B.
    Carnot cycle
    C.
    Ordinary vapour compression cycle
    D.
    Vapour compression with a reversible expansion engine

  13. Measurement of thermodynamic property of temperature is facilitated by __________ law of thermodynamics.

  14. A.
    1st
    B.
    zeroth
    C.
    3rd
    D.
    none of these

  15. The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n- octane into pure compounds each at 1 atm is

  16. A.
    -2 RT ln 0.5
    B.
    -RT ln 0.5
    C.
    0.5 RT
    D.
    2 RT

  17. Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to __________ °C.

  18. A.
    270
    B.
    327
    C.
    300
    D.
    540

  19. Entropy of an ideal gas depends upon its

  20. A.
    pressure
    B.
    temperature
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)