Air-refrigeration cycle

A. Is the most efficient of all refrigeration cycles

B. Has very low efficiency

C. Requires relatively large quantities of air to achieve a significant amount of refrigeration

D. Both (B) and (C)

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  1. Free energy change of mixing two liquid substances is a function of the
  2. As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches
  3. Pick out the wrong statement.
  4. An ideal gas is taken around the cycle ABCA as shown in P-V diagram below: The work done by the gas…
  5. The internal energy of a gas obeying P (V - b) RT (where, b is a positive constant and has a constant…
  6. The equation, Cp - Cv = R, is true for __________ gas.
  7. In the decomposition of PCl5 represented by, PCl5 PCl3 + Cl2, decrease in the pressure of the system…
  8. __________ Equation predicts the activity coefficient from experimental data.
  9. The first law of thermodynamics is a restatement of the law of conservation of
  10. The change in __________ is equal to the reversible work for compression in steady state flow process…
  11. The ammonia synthesis reaction represented by N2 + 3H2 2NH3; ΔH = - 22.4 kcal, is
  12. The chemical potential for a pure substance is __________ its partial molal free energy.
  13. An ideal monatomic gas is taken round the cycle ABCDA as shown below in the P-V diagram. The work done…
  14. An isolated system can exchange __________ with its surroundings.
  15. The first law of thermodynamics is a statement of conservation of
  16. The value of Cp & Cv respectively for monatomic gases in Kcal/kg Mole.°K are
  17. A solute distributes itself between two nonmiscible solvents in contact with each other in such a way…
  18. A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system
  19. Fugacity is a measure of the
  20. __________ increases with increase in pressure.
  21. In any spontaneous process,
  22. The third law of thermodynamics states that the
  23. Gibbs free energy (G) is represented by, G = H - TS, whereas Helmholtz free energy, (A) is given by,…
  24. If the pressure on 100 c.c. of air is halved, then its volume (at the same temperature) would be __________…
  25. Joule-Thomson experiment is
  26. Grams of butane (C4H10) formed by the liquefaction of 448 litres of the gas (measured at (STP) would…
  27. A gas shows deviation from ideal behaviour at
  28. A refrigeration cycle is the same as a __________ cycle,
  29. Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is - 57°C…
  30. Pick out the correct statement.