Melting of wax is accompanied with __________ in entropy.

A. Increase

B. Decrease

C. No change

D. None of these

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  1. Which of the following is a widely used refrigerant in vapour compression refrigeration system (using…
  2. For any system, what is the minimum number of degrees of freedom?
  3. COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about
  4. A system undergoes a change from a given initial state to a given final state either by an irreversible…
  5. Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg…
  6. The unit of equilibrium constant of a chemical reaction is the same as that of
  7. Partial molar free energy of an element A in solution is same as its
  8. Isobaric process means a constant process.
  9. Linde gas liquefaction process employs cooling
  10. The ammonia synthesis reaction represented by N2 + 3H2 2NH3; ΔH = - 22.4 kcal, is
  11. Pick out the extensive property out of the following.
  12. Joule-Thomson Co-efficient at any point on the inversion curve is
  13. The ratio of equilibrium constants (Kp2/Kp1) at two different temperatures is given by
  14. The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT)…
  15. Sound waves propagation in air exemplifies an __________ process.
  16. For an isothermal process, the internal energy of a gas
  17. Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity…
  18. The internal energy of a gas obeying P (V - b) RT (where, b is a positive constant and has a constant…
  19. In any spontaneous process, the __________ free energy decreases.
  20. A/an __________ system is exemplified by a vessel containing a volatile liquid in contact with its vapor.
  21. Third law of thermodynamics is concerned with the
  22. The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300…
  23. The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in…
  24. The free energy change for a chemical reaction is given by (where, K = equilibrium constant)
  25. The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is
  26. Pick out the correct statement:
  27. Pick out the wrong statement.
  28. Compound having large heat of formation is
  29. In an ideal gas mixture, fugacity of a species is equal to its
  30. For an ideal gas, the chemical potential is given by