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Home Chemical Engineering Chemical Engineering Thermodynamics Comments

  • Question
  • Water on heating from 1 to 4°C


  • Options
  • A. contracts
  • B. expands
  • C. has same volume
  • D. may contract or expand

  • Correct Answer
  • contracts 


  • Chemical Engineering Thermodynamics problems


    Search Results


    • 1. Entropy is a measure of the __________ of a system.

    • Options
    • A. disorder
    • B. orderly behaviour
    • C. temperature changes only
    • D. none of these
    • Discuss
    • 2. The accentric factor of a materical, '?', is defined as ? = -log10(Prsat)Tr-1 = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of accentric factor is always

    • Options
    • A. > 2
    • B. < 1
    • C. > 1
    • D. < 3
    • Discuss
    • 3. 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?

    • Options
    • A. Vapor compression cycle using expansion valve.
    • B. Air refrigeration cycle.
    • C. Vapor compression cycle using expansion engine.
    • D. Carnot refrigeration cycle.
    • Discuss
    • 4. Pick out the correct statement:

    • Options
    • 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.
    • Discuss
    • 5. Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 ⇌ PCl3 + Cl2.Degree of dissociation of PCl5 will

    • Options
    • A. decrease on addition of Cl2.
    • B. increase on addition of an inert gas at constant pressure.
    • C. decrease on increasing the pressure of the system.
    • D. none of these
    • Discuss
    • 6. Fundamental principle of refrigeration is based on the __________ law of thermodynamics.

    • Options
    • A. zeroth
    • B. first
    • C. second
    • D. third
    • Discuss
    • 7. __________ increases with increase in pressure.

    • Options
    • A. The melting point of wax
    • B. The boiling point of a liquid
    • C. both (a) and (b)
    • D. neither (a) nor (b)
    • Discuss
    • 8. The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.

    • Options
    • A. contracts
    • B. expands
    • C. does not change in volume
    • D. either (a), (b) or (c)
    • Discuss
    • 9. In a reversible chemical reaction (where, ?x = number of moles of products-number of moles of reactants )

    • Options
    • A. addition of inert gas favours the forward reaction, when ?x is positive.
    • B. pressure has no effect on equilibrium, when ?n = 0.
    • C. addition of inert gas has no effect on the equilibrium constant at constant volume for any value of ?x (+ ve, - ve) or zero).
    • D. all 'a', 'b' & 'c'.
    • Discuss
    • 10. Isobaric process means a constant process.

    • Options
    • A. temperature
    • B. pressure
    • C. volume
    • D. entropy
    • Discuss


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