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In which case, a spontaneous reaction is...

In which case, a spontaneous reaction is possible at any temperature

A

`DeltaH(-ve),DeltaS(+ve)`

B

`DeltaH(-ve),DeltaS-(ve)`

C

`DeltaH+(ve),DeltaS+(ve)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
For a spontaneous process,
`DeltaG=-ve=DeltaH-TDeltaS`
`therefore DeltaH=-ve, DeltaS=+ve`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-CHEMICAL THERMODYNAMICS AND ENERGETIC-Exercise 1
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  2. Which of the following pairs of a chemical reaction is certain to resu...

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  3. One mole of a perfect gas expands isothermally to ten times of its ori...

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  4. Which of the following does not have zero entropy even at absolute zer...

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  5. In which case, a spontaneous reaction is possible at any temperature

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  6. 2 moles of ann ideal gas at 27^(@)C are expanded reversibly from 2L to...

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  7. At 27^(@)C, latent heat of fusion of a compound is 2930 J/mol. Entropy...

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  8. In evaporation of water, DeltaH and DeltaS are

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  9. Which one of the following is correct?

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  10. The standard free energy change (DeltaG^(@)) is related to equilibrium...

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  11. Find the value of DeltaG^(@) if the DeltaH^(@)=-29.8 kcal and DeltaS^(...

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  12. If K lt 1,0, what will be the value of DeltaG^(@)?

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  13. Find the equilibrium constant K(p) in log K(p) if the standard free en...

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  14. The equilibrium constant for a reaction is 10. what will be the value ...

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  15. Which of the following correctly represents the physical significance ...

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  16. At 1 atm pressure, DeltaS=75JK^(-1)mol^(-1),DeltaH=30kJ" "mol^(-1), th...

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  17. Under which of the following sets of conditions, DeltaG is always nega...

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  18. The gibbs free energy for a reversible reaction at equilibrium is

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  19. Consider the reaction, C(s)+O(2)(g)toCO(2)(g)+393.5kJ, the signs of ...

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  20. The free energy for a reaction having DeltaH=31400cal,DeltaS=32" cal "...

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