Chemical Engineering Thermodynamics Problems and Solutions - Set 18 - ObjectiveBooks

Chemical Engineering Thermodynamics Problems and Solutions - Set 18

Practice Test: Question Set - 18

1. In case of a close thermodynamic system, there is __________ across the boundaries.
    (A) No heat and mass transfer
    (B) No mass transfer but heat transfer
    (C) Mass and energy transfer
    (D) None of these

2. Pick out the wrong statement.
    (A) At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature
    (B) Normally, the gases which are easily liquefied are more soluble in common solvents
    (C) The gases which are capable of forming ions in aqueous solution are much more soluble in water than in other solvents
    (D) At constant pressure, solubility of a gas in a liquid increases with rise in temperature

3. Entropy of a substance remains constant during a/an __________ change.
    (A) Reversible isothermal
    (B) Irreversible isothermal
    (C) Reversible adiabatic
    (D) None of these

4. Heating of water under atmospheric pressure is an __________ process.
    (A) Isochoric
    (B) Isobaric
    (C) Adiabatic
    (D) Isothermal

5. With increase in compression ratio, the efficiency of the otto engine
    (A) Increases
    (B) Decreases
    (C) Remain constant
    (D) Increases linearly

6. If we increase the pressure on a substance (which is at its triple point), then the triple point
    (A) Increases
    (B) Decreases
    (C) Remains unchanged
    (D) May increase or decrease; depends on the substance

7. When liquid and vapor phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is
    (A) More in vapor phase
    (B) More in liquid phase
    (C) Same in both the phases
    (D) Replaced by chemical potential which is more in vapor phase

8. Degree of freedom of the system ice-water-vapor will be
    (A) 0
    (B) 1
    (C) 2
    (D) 3

9. A refrigerator may be termed as a
    (A) Heat pump
    (B) Heat engine
    (C) Carnot engine
    (D) None of these

10. Filling of gas from a high pressure cylinder into small bottles is an example of a/an __________ process.
    (A) Equilibrium
    (B) Adiabatic
    (C) Steady
    (D) Unsteady

11. Adiabatic compression of a saturated water vapor makes it
    (A) Supersaturated
    (B) Superheated
    (C) Both (a) and (b)
    (D) Neither (a) nor (b)

12. Pick out the undesirable property for a good refrigerant.
    (A) High thermal conductivity
    (B) Low freezing point
    (C) Large latent heat of vaporization
    (D) High viscosity

13. In case of an __________ process, the temperature of the system increases.
    (A) Isothermal compression
    (B) Isothermal expansion
    (C) Adiabatic expansion
    (D) Adiabatic compression

14. If the vapor pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the
    (A) Maxwell's equation
    (B) Clausius-Clapeyron Equation
    (C) Van Laar equation
    (D) Nernst Heat Theorem

15. Free energy change of mixing two liquid substances is a function of the
    (A) Concentration of the constituents only
    (B) Quantities of the constituents only
    (C) Temperature only
    (D) All (a), (b) and (c)

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