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An ideal liquid refrigerant should

A. Not have a sub-atmospheric vapour pressure at the temperature in the refrigerator coils

B. Not have unduly high vapour pressure at the condenser temperature

C. Both (A) and (B)

D. Have low specific heat

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  1. The absolute entropy for all crystalline substances at absolute zero temperature is
  2. In a reversible process
  3. Domestic refrigerator usually works on the __________ refrigeration cycle.
  4. Which of the following is an undesirable characteristic of a refrigerant?
  5. At 60° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous…
  6. Entropy change of mixing two liquid substances depends upon the
  7. A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the…
  8. Which is not a refrigerant?
  9. Maximum work that could be secured by expanding the gas over a given pressure range is the __________…
  10. The co-efficient of performance (COP) of a refrigerating system, which is its index of performance,…
  11. A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system
  12. In the equation, PVn = Constant, if the value of n = 0, then it represents a reversible __________ process.
  13. The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing…
  14. For multi-component multiple phases to be in equilibrium at the same pressure and temperature, the __________…
  15. The unity of Planck's constant 'h' in the equation, E = hv is
  16. Entropy is a measure of the __________ of a system.
  17. The point at which all the three (solid, liquid and gas) phases co-exist, is known as the __________…
  18. Heat of reaction at constant volume is identified with __________ change.
  19. The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is
  20. The shape of T-S diagram for Carnot Cycle is a
  21. __________ explains the equilibrium constant for any chemical reaction.
  22. Fundamental principle of refrigeration is based on the __________ law of thermodynamics.
  23. Free energy change at equilibrium is
  24. Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity…
  25. A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature…
  26. Free energy changes for two reaction mechanism 'X' and 'Y are respectively - 15 and - 5 units. It implies…
  27. Maxwell's relation corresponding to the identity, dH = dS = Vdp + Σμi dni is
  28. For a single component two phase mixture, the number of independent variable properties are
  29. Which of the following equations is used for the prediction of activity co-efficient from experiments?
  30. Near their critical temperatures, all gases occupy volumes __________ that of the ideal gas.