Third law of thermodynamics is concerned with the

A. Value of absolute entropy

B. Energy transfer

C. Direction of energy transfer

D. None of these

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  1. Specific/molar Gibbs free energy for a pure substance does not change during
  2. The expression for entropy change given by, ΔS = - nR ln (P2/P1), holds good for
  3. Refrigeration capacity of a household refrigerator may be round about __________ tons.
  4. The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT)…
  5. Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system…
  6. While dissolving a gas into a liquid at a constant temperature, the ratio of the concentration of the…
  7. During Joule-Thomson expansion of gases
  8. 4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is
  9. If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial…
  10. The number of degrees of freedom for an azeotropic mixture in a two component vapour-liquid equilibria…
  11. The kinetic energy of gas molecule is zero at
  12. At absolute zero temperature, the __________ of the gas is zero.
  13. For equilibrium process (i.e. reversible) in an isolated system
  14. Trouton's ratio of __________ liquids is calculated using Kistyakowsky equation.
  15. Activity co-efficient is a measure of the
  16. The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.
  17. Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid…
  18. Critical solution temperature (or the consolute temperature) for partially miscible liquids (e.g., phenol-water)…
  19. Pick out the correct statement.
  20. Efficiency of a Carnot engine working between temperatures T1 and T2 (T1 < T) is
  21. Melting of ice is an example of an __________ process.
  22. Which of the following is a widely used refrigerant in vapour compression refrigeration system (using…
  23. Enthalpy changes over a constant pressure path are always zero for __________ gas.
  24. Those solutions in which there is no volume change upon mixing the components in the liquid state and…
  25. In a homogeneous solution, the fugacity of a component depends upon the
  26. Critical temperature is defined as the temperature above which a gas will
  27. Gases are cooled in Joule-Thomson expansion, when it is __________ inversion temperature.
  28. For an isothermal reversible compression of an ideal gas
  29. For a constant pressure reversible process, the enthalpy change (ΔH) of the system is
  30. Which of the following represents the Virial equation of state?