Discussion
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- Question
The expression,
, gives the free energy change
Options- A. with pressure changes at constant temperature.
- B. under reversible isothermal volume change.
- C. during heating of an ideal gas.
- D. during cooling of an ideal gas.
- Correct Answer
- with pressure changes at constant temperature.
- 1. All gases during throttling process at atmospheric temperature and pressure show a cooling effect except
Options- A. CO2
- B. H2
- C. O2
- D. N2 Discuss
- 2. High __________ is an undesirable property for a good refrigerant.
Options- A. specific heat
- B. latent heat of vaporisation
- C. viscosity
- D. specific vapor volume Discuss
- 3. Internal energy change of a system over one complete cycle in a cyclic process is
Options- A. zero
- B. +ve
- C. -ve
- D. dependent on the path Discuss
- 4. Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to __________ °C.
Options- A. 270
- B. 327
- C. 300
- D. 540 Discuss
- 5. Out of the following refrigration cycles, which one has the minimum COP (Co-efficient of performance)?
Options- A. Air cycle
- B. Carnot cycle
- C. Ordinary vapour compression cycle
- D. Vapour compression with a reversible expansion engine Discuss
- 6. The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.
Options- A. kinematic viscosity
- B. work
- C. temperature
- D. none of these Discuss
- 7. In jet refrigerators, the refrigerating fluid is practically always
Options- A. water
- B. ammonia
- C. freon
- D. brine Discuss
- 8. For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases.
Options- A. decreases
- B. increases
- C. remains same
- D. decreases linearly Discuss
- 9. Van Laar equation deals with the activity co-efficients in
Options- A. binary solutions
- B. ternary solutions
- C. azeotropic mixture only
- D. none of these Discuss
- 10. Which of the following is not an intensive property?
Options- A. Chemical potential
- B. Surface tension
- C. Heat capacity
- D. None of these Discuss
Chemical Engineering Thermodynamics problems
Search Results
Correct Answer: H2
Correct Answer: viscosity
Correct Answer: zero
Correct Answer: 327
Correct Answer: Air cycle
Correct Answer: none of these
Correct Answer: water
Correct Answer: increases
Correct Answer: binary solutions
Correct Answer: Heat capacity
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