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Suppose that a reaction has DeltaH=-40kJ...

Suppose that a reaction has `DeltaH=-40kJ` and `DeltaS =- 50J//K`. At what temperature range will it change from spontaneous to non-spontaneous?

A

0.8 K to 1 K

B

799 K to 800 K

C

800 K to 801 K

D

799 K to 801 K

Text Solution

Verified by Experts

The correct Answer is:
D
`DeltaG_(799)=-40xx1000-799xx(-50)`,
`DeltaG_(799)=-50" J spontaneous"`
`DeltaG_(801)=-40xx1000-801(-50)`
`DeltaG_801=+50 " J non-spontaneous"`
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NARENDRA AWASTHI-THERMODYNAMICS-Exercise
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  2. Which of the following conditions regarding a chemical process ensures...

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

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

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

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  6. 19 gm of ice is converted into water at 0^(@)C and 1 atm. The entropie...

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

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

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

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

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

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  12. which of the folowing statement is correct?

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

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

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

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

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

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

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

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  20. Which of the following value of DeltaH(f)^(@) represent that the produ...

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