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Chemical Engineering :: Chemical Engineering Thermodynamics

  1. In a P-V diagram (for an ideal gas), an isothermal curve will coincide withan adiabatic curve (through a point), when

  2. A.

     Cp < Cv

    B.

     Cp = Cv

    C.

     Cp > Cv

    D.

     Cp ≥ Cv


  3. The shape of T-S diagram for Carnot Cycle is a

  4. A.

     Rectangle

    B.

     Rhombus

    C.

     Trapezoid

    D.

     Circle


  5. With increase in compression ratio, the efficiency of the otto engine

  6. A.

     Increases

    B.

     Decreases

    C.

     Remains constant

    D.

     Increases linearly


  7. What is the degree of freedom for a system comprising liquid water equilibrium with its vapour?

  8. A.

     0

    B.

     1

    C.

     2

    D.

     3


  9. __________ functions are exemplified by heat and work.

  10. A.

     Path

    B.

     Point

    C.

     State

    D.

     None of these


  11. A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature after each stage. The intermediate pressure for the minimum total work requirement should be equal to the __________ mean of P₁ and P₂.(where, P₁ and P₂ are initial and final pressures respectively)

  12. A.

     Logarithmic

    B.

     Arithmetic

    C.

     Geometric

    D.

     Harmonic


  13. Helmholtz free energy (A) is defined as

  14. A.

     A = H - TS

    B.

     A = E - TS

    C.

     A = H + TS

    D.

     None of these


  15. Gibbs free energy (F) is defined as

  16. A.

     F = E - TS

    B.

     F = H - TS

    C.

     F = H + TS

    D.

     F = E + TS


  17. A system is said to be at equilibrium, if the entropy of the system has reached __________ value.

  18. A.

     Minimum

    B.

     Zero

    C.

     Maximum

    D.

     None of these


  19. In the reaction, C + O₂ → CO₂ ; ΔH = - 94 kcal. What is the heat content (enthalpy)of O₂?

  20. A.

     -94 kcal

    B.

     > -94 kcal

    C.

     < - 94 kcal

    D.

     Zero