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AtoB , DeltaH=4 kcal mol^(-1), DeltaS=10...

`AtoB` , `DeltaH=4 kcal mol^(-1)`, `DeltaS=10 cal mol^(-1)K^(-1)`. Reaction is spontaneous when temperature is

A

`400 K`

B

`300 K`

C

`500 K`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
`DeltaG=DeltaH-TDeltaS`. `DeltaG` will be negatively charged only when `T=500 K`.
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DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. A process is taking place at constant temperature and pressure. Then

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  2. One mole of a perfect gas expands isothermally to ten times its origin...

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  3. AtoB , DeltaH=4 kcal mol^(-1), DeltaS=10 cal mol^(-1)K^(-1). Reaction ...

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  4. The sublimation energy of I(2) (solid) is 57.3 KJ/mole and enthalpy o...

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  5. For the reaction: 2H(2)(g) +O(2)(g) rarr 2H(2)O(g), DeltaH =- 571 kJ...

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  6. The standard molar heats of formation of ethane, carbon dioxide, and l...

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  7. 0.06 mole of KNO(3) is added to 100cm^(3) of water at 298 K. The entha...

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  8. Which of the following equations does not correctly represent the firs...

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  9. For the reaction CO (g) + (1)/(2) O(2) (g) rarr CO(2) (g) Delta H ...

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  10. The enthalpy of vaporisation of liquid water using the data H(2)(g)+...

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  11. The enthalpy of certain reaction at 273 K is -20.75 kJ. The enthalpy o...

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  12. The bond energies of C=C and C-C at 298 K are 590 and 331 kJ mol^(-1),...

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  13. Water is supercooled to - 4^(@)C. The enthalpy (H) is

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  14. When 0.1 mol of a gas absorbs 41.75 J of heat at constant volume, the ...

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  15. If 150 kJ of energy is needed for muscular work to walk a distance of ...

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  16. A process is spantaneous at a given temperature if

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  17. Enthalpy is equal to

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  18. Which one of the following sets of units represents the smallest and t...

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  19. If K lt 1 then the value of Delta G^(@) will be

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  20. During isothermal expansion of an ideal gas, its:

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