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For a reaction to occur spontaneously...

For a reaction to occur spontaneously

A

`DeltaS` must be negative

B

`(-DeltaH+T DeltaS)` must be positive

C

`DeltaH + TDeltaS` must be negative

D

`DeltaH` must be negative

Text Solution

Verified by Experts

The correct Answer is:
B
`(DeltaG)_("system")=DeltaH-T.DeltaS`
and `" "DeltaH-T.DeltaSlt0`
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NARENDRA AWASTHI-THERMODYNAMICS-Exercise
  1. Consider the following reaction at temperature T : CH(2)=CH(2)(g) +...

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  2. For a process to be spontaneous, DeltaG must be………… .

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  3. For a reaction to occur spontaneously

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  4. Which of the following conditions reagarding a chemical process ensure...

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  5. The free energy change DeltaG = 0, when

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

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

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

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

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  10. 19 gm of ice is converted into water at 0^(@)C and 1 atm. The entropie...

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

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

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

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

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

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  16. which of the folowing statement is correct?

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

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

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

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

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