At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.

A. 72

B. 92

C. 142

D. 192

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. A solid is transformed into vapour without going to the liquid phase at
  2. Pick out the correct statement.
  3. The equation, Cp - Cv = R, is true for __________ gas.
  4. Pick out the wrong statement.
  5. Entropy of a substance remains constant during a/an __________ change.
  6. The expression for entropy change given by, ΔS = - nR ln (P2/P1), holds good for
  7. The effect of changing the evaporator temperature on COP as compared to that of changing the condenser…
  8. The unit of equilibrium constant of a chemical reaction is the same as that of
  9. Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of…
  10. The heat capacities for the ideal gas state depend upon the
  11. During Joule-Thomson expansion of gases
  12. Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system…
  13. __________ does not change during phase transformation processes like sublimation, melting & vaporisation.
  14. An ideal gas is taken around the cycle ABCA as shown in P-V diagram below: The work done by the gas…
  15. The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called…
  16. Which law of the thermodynamics provides basis for measuring the thermodynamic property?
  17. Activity co-efficient is a measure of the
  18. Enthalpy changes over a constant pressure path are always zero for __________ gas.
  19. In case of steady flow compression polytropic process (PVn = constant), the work done on air is the…
  20. Second law of thermodynamics is concerned with the
  21. Fugacity is most helpful in
  22. In which of the following reaction equilibrium, the value of equilibrium constant Kp will be more than…
  23. Throttling process is a/an __________ process.
  24. Trouton's ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal…
  25. What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid…
  26. Gibbs free energy (G) is represented by, G = H - TS, whereas Helmholtz free energy, (A) is given by,…
  27. As the entropy of the universe is increasing, day by day, the work producing capacity of a heat engine…
  28. For an irreversible process involving only pressure-volume work
  29. Gases are cooled in Joule-Thomson expansion, when it is __________ inversion temperature.
  30. Gibbs-Duhem equation