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Comment on the spontaneity of a process ...

Comment on the spontaneity of a process when
`DeltaH gt 0, T DeltaS lt 0`

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To determine the spontaneity of a process under the given conditions, we will analyze the relationship between the Gibbs free energy change (ΔG), the change in enthalpy (ΔH), and the change in entropy (ΔS) using the equation: \[ \Delta G = \Delta H - T \Delta S \] ### Step 1: Identify the given conditions We have: ...
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Comment on the spontaneity of a process when Delta H gt 0, T Delta S lt 0

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Comment on the spontaneity of a process when DeltaH gt 0, T Delta Sgt 0 and T DeltaS lt DeltaH

Discuss the effect of temperature on the spontaneity of a process when for the process both DeltaH and DeltaS are positive.

Discuss the effect of temperature on the spontaneity of a process when for the process both DeltaH and DeltaS are negative.

What is the status of a process when (i) Delta G lt 0 (ii) DeltaG = 0 (iii) DeltaG > 0 ? In which of the above cases, the process can be used for obtaining useful work?

For adiabatic process, DeltaH = 0

Can DeltaH be regarded as the sole criterion to explain the spontaneity of a process? If no, explain why?

The change in Gibbs free energy of the system along provides a criterion for the spontaneity of a process at constant temperature and pressure. A change in the free energy of a sytem at constant temperature and pressure will be: DeltaG_("system") = DeltaH_("system") - T DeltaS_("system") For a spontaneous reaction DeltaG , equilibrium constant K and E_("cell")^(0) will be respectively:

For an irreversible process, DeltaS gt 0 .

ICSE-CHEMICAL THERMODYNAMICS -SHORT ANSWER TYPE QUESTIONS
  1. What are spontaneous processes ? Mention the conditions for a reaction...

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  2. What is entropy ? State the effect of increased temperature on the ent...

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  3. State the thermodynamic conditions for spontaneous occurrence of a pro...

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  4. DeltaH and DeltaS are positive for a chemical reaction. Under what con...

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  5. What is meant by free energy of a substance ? How is it related to its...

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  6. Define and explain the term entropy of a system. Illustrate it using a...

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  7. Comment on the spontaneity of a process when DeltaH gt 0, T Delta Sgt...

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  8. Comment on the spontaneity of a process when DeltaH gt 0, T DeltaS l...

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  9. Comment on the spontaneity of a process when DeltaH gt 0, T Delta Sgt...

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  10. Comment on the spontaneity of a process when DeltaH gt 0, T Delta Sgt...

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  11. Discuss the effect of temperature on the spontaneity of a process.

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  12. How is standard free energy change related to equilibrium constant ?

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  13. Discuss the relation between free energy and EMF.

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  14. State the third law of thermodynamics.

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  15. Why is heat evolved or absorbed in a chemical reaction ?

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  16. What do you understand by exothermic and endothermic reactions ? How a...

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  17. What do you understand by standard enthalpy of a reaction and how is i...

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  18. Define heat of formation.How is it useful in the calculation of the he...

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  19. Calculate the calorific value of sugar if its heat of combustion is 56...

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  20. Why is heat of neutralisation for a strong acid and strong base consta...

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