Fundamentals of Chemical Engineering Thermodynamics MCQ - Set 19 - ObjectiveBooks

# Practice Test: Question Set - 19

1. For water at 300°C, it has a vapor pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapor phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be
(A) 6738.9
(B) 6753.5
(C) 7058.3
(D) 9000

2. Gibbs-Helmholtz equation is
(A) ∆F = ∆H + T [∂(∆F)/∂T]P
(B) Î”F = Î”H - TÎ”T
(C) d(E - TSTV < 0
(D) dP/dT = ∆Hvap/T.∆Vvap

3. For an ideal gas, the internal energy depends upon its __________ only.
(A) Molecular size
(B) Temperature
(C) Volume
(D) Pressure

4. Pick out the correct statement:
(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 cannot be exchanged with the surroundings in a closed system

5. Pick out the extensive property out of the following.
(A) Surface tension
(B) Free energy
(C) Specific heat
(D) Refractive index

6. The equation, PV = nRT, is best obeyed by gases at
(A) Low pressure & high temperature
(B) High pressure & low temperature
(C) Low pressure & low temperature
(D) None of these

7. The temperature at the eutectic point of the system is the __________ temperature that can be attained in the system.
(A) Lowest
(B) Highest
(C) Average
(D) None of these

8. Heat of reaction at constant volume is identified with __________ change.
(A) Enthalpy
(B) Internal energy
(C) Either (a) or (b)
(D) Neither (a) nor (b)

9. Pick out the correct statement.
(A) Compression ratio of an Otto engine is comparatively higher than a diesel engine
(B) Efficiency of an Otto engine is higher than that of a diesel engine for the same compression ratio
(C) Otto engine efficiency decreases with the rise in compression ratio, due to decrease in work produced per quantity of heat
(D) Diesel engine normally operates at lower compression ratio than an Otto engine for an equal output of work

10. The equation DU = Tds - PdV is applicable to infinitesimal changes occurring in
(A) An open system of constant composition
(B) A closed system of constant composition
(C) An open system with changes in composition
(D) A closed system with changes in composition

11. The value of Cp & Cv respectively for monatomic gases in Kcal/kg Mole.°K are
(A) 5 & 3
(B) 3.987 & 1.987
(C) 1.987 & 0.66
(D) 0.66 & 1.987

12. Which of the following is not an intensive property?
(A) Molar heat capacity
(B) Internal energy
(C) Viscosity
(D) None of these

13. Which of the following represents the Virial equation of state?
(A) T = [RT/(V- b)] - [a/√T. V(V + b)]
(B) PV/RT = 1 + (B/V) + (C/V2) + ……
(C) n1u2 + Î¼2Î¼1 = 0
(D) None of these

14. Van Laar equation deals with the activity co-efficients in
(A) Binary solutions
(B) Ternary solutions
(C) Azeotropic mixture only
(D) None of these

15. Pick out the wrong statement:
(A) The expansion of a gas in vacuum is an irreversible process
(B) An isometric process is a constant pressure process
(C) Entropy change for a reversible adiabatic process is zero
(D) Free energy change for a spontaneous process is negative

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