What is Chemical Engineering Thermodynamics Computer Test - Set 13 - ObjectiveBooks

# Practice Test: Question Set - 13

1. In case of a reversible process (following pvn = constant), work obtained for trebling the volume (v1 = 1 m3 and v23 m3) is maximum, when the value of 'n' is
(A) 0
(B) 1
(C) y = 1.44
(D) 1.66

2. Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of
(A) Sublimation
(B) Fusion
(C) Transition
(D) Vaporization

3. Which of the following is true for Virial equation of state?
(A) Virial co-efficients are universal constants
(B) Virial co-efficients 'B' represents three body interactions
(C) Virial co-efficients are function of temperature only
(D) For some gases, Virial equations and ideal gas equations are the same

4. Pick out the wrong statement.
(A) Activity co-efficient is dimensionless.
(B) In case of an ideal gas, the fugacity is equal to its pressure.
(C) In a mixture of ideal gases, the fugacity of a component is equal to the partial pressure of the component.
(D) The fugacity co-efficient is zero for an ideal gas

5. The gas law (PV = RT) is true for an __________ change.
(A) Isothermal
(C) Both (a) & (b)
(D) Neither (a) nor (b)

6. The heat capacities for the ideal gas state depend upon the
(A) Pressure
(B) Temperature
(C) Both (a) & (b)
(D) Neither (a) nor (b)

7. The work done in isothermal compression compared to that in adiabatic compression will be
(A) Less
(B) More
(C) Same
(D) More or less depending upon the extent of work done

8. Compound having large heat of formation is
(A) More stable
(B) Less stable
(C) Not at all stable (like nascent O2)
(D) Either more or less stable; depends on the compound

9. Water on heating from 1 to 4°C
(A) Contracts
(B) Expands
(C) Has same volume
(D) May contract or expand

10. The equation, Cp - Cv = R, is true for __________ gas.
(A) No
(B) Any real
(C) Only ideal
(D) Both (b) and (c)

11. Pick out the wrong statement.
(A) The values of (∂P/∂V)T and (∂2P/∂V2)T are zero for a real gas at its critical point
(B) Heat transferred is equal to the change in the enthalpy of the system, for a constant pressure, non-flow, mechanically reversible process
(C) Thermal efficiency of a Carnot engine depends upon the properties of the working fluid besides the source & sink temperatures
(D) During a reversible adiabatic process, the entropy of a substance remains constant

12. What happens in a reversible adiabatic compression?
(A) Heating occurs
(B) Cooling occurs
(C) Pressure is constant
(D) Temperature is constant

13. In the equation, PVn = constant, if the value of n is in between 1 and y (i.eCp/Cv), then it represents a reversible __________ process.
(A) Isometric
(B) Polytropic
(C) Isentropic
(D) Isobaric

14. Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.
(A) Isothermal
(C) Isentropic
(D) None of these

15. The chemical potential of any constituent of an ideal solution depends on the __________ of the solution.
(A) Temperature
(B) Pressure
(C) Composition
(D) All (a), (b) and (c)

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