Chemical Engineering Thermodynamics

1. _________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low.

  1. Bucket
  2. Throttling
  3. Separating
  4. A combination of separating & throttling

Correct answer: (D)
A combination of separating & throttling

2. _________ decreases during adiabatic throttling of a perfect gas.

  1. Entropy
  2. Temperature
  3. Enthalpy
  4. Pressure

Correct answer: (D)
Pressure

3. _________ does not change during phase transformation processes like sublimation, melting & vaporisation.

  1. Entropy
  2. Gibbs free energy
  3. Internal energy
  4. All (A), (B) & (C)

Correct answer: (B)
Gibbs free energy

4. _________ Equation predicts the activity co-efficient from experimental data.

  1. Lewis-Randall
  2. Margules
  3. Van Laar
  4. Both (B) & (C)

Correct answer: (D)
Both (B) & (C)

5. _________ explains the equilibrium constant for any chemical reaction.

  1. Henry's law
  2. Law of mass action
  3. Hess's law
  4. None of these

Correct answer: (B)
Law of mass action

6. _________ functions are exemplified by heat and work.

  1. Path
  2. Point
  3. State
  4. None of these

Correct answer: (A)
Path

7. _________ increases with increase in pressure.

  1. The melting point of wax
  2. The boiling point of a liquid
  3. Both (A) and (B)
  4. Neither (A) nor (B)

Correct answer: (C)
Both (A) and (B)

8. _________ law of thermodynamics ascertains the direction of a particular spontaneous process.

  1. Zeroth
  2. First
  3. Second
  4. Third

Correct answer: (C)
Second

9. (∂E/∂T)V is the mathematical expression for

  1. CV
  2. Enthalpy change
  3. Free energy change
  4. None of these

Correct answer: (D)
None of these

10. (∂H/∂T)P is the mathematical expression for

  1. CV
  2. Entropy change
  3. Gibbs free energy
  4. None of these

Correct answer: (D)
None of these

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