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Which of the following conditions regard...

Which of the following conditions regarding a chemical process ensures its spontaneity at all temperature ?

A

`DeltaH` and `DeltaS` both `+ve`

B

`DeltaH` is `-ve` and `DeltaS` is `+ve`

C

`DeltaH` and `DeltaS` both `-ve`

D

`DeltaH` is `+ve` and `DeltaS` is `-ve`

Text Solution

Verified by Experts

The correct Answer is:
D
`DeltaG=DeltaH-TDeltaS=+ve`
for spontaneous change `DeltaHgt0,DeltaSlt0`
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NARENDRA AWASTHI-THERMODYNAMICS-Exercise
  1. Which of the following conditions reagarding a chemical process ensure...

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  2. The free energy change DeltaG = 0, when

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  3. Which of the following conditions regarding a chemical process ensures...

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  4. Suppose that a reaction has DeltaH=-40kJ and DeltaS =- 50J//K. At what...

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  5. For isothermal expansion in case of an ideal gas :

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  6. What is the normal boiling point of mercury? Given : DeltaH (f)^(@)...

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  7. 19 gm of ice is converted into water at 0^(@)C and 1 atm. The entropie...

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  8. Using the listed [DeltaG(f)^(@) values] calculate DeltaG^(@) for the r...

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  9. From the following DeltaH^(@) and DeltaS^(@) values, predict which of ...

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  10. Calculate DeltaH(f)^(@) for Ubr(4) from the DeltaG^(@) of reaction and...

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  11. The entropies of H(2) (g) and H (g) are 130.6 and 114.6 J mol^(-1)K^(-...

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  12. Consider the DeltaG(f)^(@) and DeltaH(f)^(@) (kJ//mol) for the followi...

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  13. which of the folowing statement is correct?

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  14. Calculate DeltaG^(@) (kJ/mol) at 127^(@)C for a reaction with K("equil...

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  15. When reaction is at standard state at equilibrium, then

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  16. For the auto-ionization of water at 25^(@)C, H(2)O(l)iff H^(+)(aq)+OH^...

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  17. State Hess's law. Give two applications of it.

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  18. An imaginary reaction X rarr Y takes place in three steps X rarr A...

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  19. The enthalpy change for a reaction does not depend upon:

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  20. The standard enthalpy of formation of gaseous H(2)O at 298 K is -241.8...

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