A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown below in the P-V diagram. The net work done during the complete cycle is given by the area covered by





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  1. Gases are cooled in Joule-Thomson expansion, when it is __________ inversion temperature.
  2. Ideal gas law is applicable at
  3. Sound waves propagation in air exemplifies an __________ process.
  4. Which of the following is not a reversible process?
  5. For spontaneous changes in an isolated system (S = entropy)
  6. Variation of equilibrium pressure with temperature for any two phases of a given substances is given…
  7. For an ideal solution, the value of activity co-efficient is
  8. The total change in the enthalpy of a system is independent of the
  9. A gas can be liquefied by pressure alone only, when its temperature is __________ its critical temperature.
  10. Cp of a gas at its critical temperature and pressure
  11. Third law of thermodynamics is concerned with the
  12. In any spontaneous process,
  13. In case of steady flow compression polytropic process (PVn = constant), the work done on air is the…
  14. Heat of formation of an element in its standard state is
  15. Thermal efficiency of a Carnot engine can approach 100%, only when the temperature of the
  16. Throttling process is a/an __________ process.
  17. The relation connecting the fugacities of various components in a solution with one another and to composition…
  18. Translational kinetic energy of molecules of an ideal gas is proportional to (where, T = absolute temperature…
  19. Critical temperature is defined as the temperature above which a gas will
  20. Maximum work that could be secured by expanding the gas over a given pressure range is the __________…
  21. Molar heat capacity of water in equilibrium with ice at constant pressure is __________ Kcal/kg mole.…
  22. High __________ is an undesirable property for a good refrigerant.
  23. Pick out the wrong statement
  24. Pick out the wrong statement.
  25. Enthalpy of a gas depends upon its
  26. In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures…
  27. If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical,…
  28. Entropy of a substance remains constant during a/an __________ change.
  29. At triple point (for one component system), vapour pressure of solid as compared to that of liquid will…
  30. Grams of butane (C4H10) formed by the liquefaction of 448 litres of the gas (measured at (STP) would…