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  1. Third law of thermodynamics is concerned with the

  2. A.

     Value of absolute entropy

    B.

     Energy transfer

    C.

     Direction of energy transfer

    D.

     None of these


  3. Second law of thermodynamics is concerned with the

  4. A.

     Amount of energy transferred

    B.

     Direction of energy transfer

    C.

     Irreversible processes only

    D.

     Non-cyclic processes only


  5. Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.

  6. A.

     Ideal

    B.

     Real

    C.

     Isotonic

    D.

     None of these


  7. Internal energy change of a system over one complete cycle in a cyclic process is

  8. A.

     Zero

    B.

     +ve

    C.

     -ve

    D.

     Dependent on the path


  9. Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be

  10. A.

     Same

    B.

     Doubled

    C.

     Halved

    D.

     One fourth of its original value


  11. Work done in case of free expansion is

  12. A.

     Indeterminate

    B.

     Zero

    C.

     Negative

    D.

     None of these


  13. Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which

  14. A.

     A homogeneous solution (say of phenol water) is formed

    B.

     Mutual solubility of the two liquids shows a decreasing trend

    C.

     Two liquids are completely separated into two layers

    D.

     None of these


  15. In which of the following reaction equilibria, the value of equilibrium constant Kp will be more than is Kc?

  16. A.

     2HI ⇋ H₂ + I₂

    B.

     N₂O₄ ⇋ 2NO₂

    C.

     2SO₂ + O₂ ⇋ 2SO₃

    D.

     None of these


  17. As the temperature is lowered towards the absolute zero, the value of ∂(ΔF)/∂T, then approaches

  18. A.

     Unity

    B.

     Zero

    C.

     That of the heat of reaction

    D.

     Infinity


  19. Reduced pressure of a gas is the ratio of its

  20. A.

     Pressure to critical pressure

    B.

     Critical pressure to pressure

    C.

     Pressure to pseudocritical pressure

    D.

     Pseudocritical pressure to pressure