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Entropy change in case of reversible adiabatic process is

A. Minimum

B. Zero

C. Maximum

D. Indeterminate

Correct Answer : B.


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  1. During adiabatic expansion of gas
  2. The number of degrees of freedom for a mixture of ice and water (liquid) are
  3. Joule-Thomson co-efficient is defined as
  4. Which is a state function?
  5. In jet refrigerators, the refrigerating fluid is practically always
  6. Fugacity is a measure of the
  7. While dissolving a gas into a liquid at a constant temperature, the ratio of the concentration of the…
  8. Joule-Thomson effect i.e., a throttling process is a constant __________ process.
  9. Free energy
  10. As the temperature is lowered towards the absolute zero, the value of ∂(ΔF)/∂T, then…
  11. The internal energy of an ideal gas does not change in a reversible __________ process.
  12. __________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very…
  13. Chemical engineering thermodynamics is concerned with the __________ in/of chemical processes.
  14. Pick out the wrong statement.
  15. In a homogeneous solution, the activity coefficient of a component depends upon the
  16. (1/V) (∂V/∂T)P is the mathematical expression
  17. Fugacity and pressure are numerically equal, when the gas is
  18. The change in Gibbs free energy for vaporisation of a pure substance is
  19. dW and dq are not the exact differential, because q and W are
  20. Maximum work that could be secured by expanding the gas over a given pressure range is the __________…
  21. Heat is added at constant pressure in an ideal __________ cycle.
  22. The unit of fugacity is the same as that of the
  23. Joule-Thomson experiment is
  24. Internal energy change of a system over one complete cycle in a cyclic process is
  25. Enthalpy changes over a constant pressure path are always zero for __________ gas.
  26. In case of a reversible process (following pvn = constant), work obtained for trebling the volume (v1…
  27. Entropy change of mixing two liquid substances depends upon the
  28. In any spontaneous process, the __________ free energy decreases.
  29. Throttling (Joule-Thomson effect) process is a constant __________ process.
  30. For spontaneous changes in an isolated system (S = entropy)