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A chemical reaction will occur spontaneously at constant pressure and temperature, if the free energy is

A. Zero

B. Positive

C. Negative

D. None of these

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

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  1. Consider the reaction, C + O2 CO2; ΔH = - 94 kcal. What will be the value of ΔH for the reaction…
  2. The equation, (d loge PA/d loge xA) = (d loge PA/d loge xB) applicable to a binary solution of components.…
  3. Pick out the extensive property out of the following.
  4. A refrigeration cycle is the same as a __________ cycle,
  5. Pick out the wrong statement.
  6. When pressure is applied on the system, ice ↔ water, then
  7. The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature…
  8. As the temperature is lowered towards the absolute zero, the value of ∂(ΔF)/∂T, then…
  9. The number of degrees of freedom for an azeotropic mixture in a two component vapour-liquid equilibria…
  10. The Carnot co-efficient of performance (COP) of a domestic air conditioner compared to a household refrigerator…
  11. Critical solution temperature (or the consolute temperature) for partially miscible liquids (e.g., phenol-water)…
  12. Which of the following has the minimum value of COP for a given refrigeration effect?
  13. If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH…
  14. The third law of thermodynamics states that the
  15. The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium,…
  16. Mollier chart is a __________ plot.
  17. Chemical engineering thermodynamics is concerned with the __________ in/of chemical processes.
  18. One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one
  19. A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the…
  20. During the phase transition, __________ changes.
  21. A solid is transformed into vapour without going to the liquid phase at
  22. Clausius-Clapeyron equation is applicable to __________ equilibrium processes.
  23. Refrigerants commonly used for domestic refrigerators are
  24. For spontaneous changes in an isolated system (S = entropy)
  25. For an ideal gas, the activity co-efficient is
  26. A system is said to be at equilibrium, if the entropy of the system has reached __________ value.
  27. A system is said to be isopiestic, if there is no __________ change.
  28. No work is done by the system, when a reaction occurs at constant
  29. Gases are cooled in Joule-Thomson expansion, when it is __________ inversion temperature.
  30. Enthalpy of a gas depends upon its