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For a reaction at 25^(@)C enthalpy chang...

For a reaction at `25^(@)C` enthalpy change `(DeltaH)` and entropy change `(DeltaS)` are `-11.7 K J mol^(-1)` and `-105J mol^(-1) K^(-1)`, respectively. Find out whether this reaction is spontaneous or not?

A

Spontaneous

B

Non spontaneous

C

At equilibrium

D

Can't say anything

Text Solution

Verified by Experts

The correct Answer is:
B
`Delta G = Delta H-T Delta S`
`=-11.7xx10^(3)-298xx(-105)`
`Delta G=+19590 J mol^(-1)`
`Delta G = +ve`, so it is non spontaneous process
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ALLEN-THERMODYNAMICS -EXERCISE -2
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  2. A gas is allowed to expand reversibly under adiabatic conditions. What...

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  3. For a reaction at 25^(@)C enthalpy change (DeltaH) and entropy change ...

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  4. The spontaneous nature of a reaction is impossible if

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  5. At a certain temperature T, the endothermic reaction A rarr B proceeds...

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  6. If Delta H gt 0 and Delta S gt 0, the reaction proceeds spontaneously ...

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  7. The temperature at which the reaction Ag(2)O(s)to2Ag(s)+(1)/(2)O(2)(...

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  8. The enthalpy change for a given reaction at 298 K is -x cal mol^(-1). ...

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  9. Which of the following is true fo the reacion H(2)O(l)hArr H(2)O(g) at...

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  10. For the reaction Ag(2)O(s) to 2Ag(s)+1/2 O(2)(g) the value of triangle...

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  11. For hypothetical reversible reaction 1//2A(2)(g) +3//2B(2)(g) rarr A...

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  12. For the precipitation of AgCl by Ag^(+) ions and HCl

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  13. What is the sign of Delta G for the process of ice melting at 283 K ?

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  14. What is the free energy change triangleG when 1.0 mole of water at 100...

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  15. A reaction A +B rarr C+D +q is found to have a positive entropy change...

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  16. Equilibrium constant of a reaction is related to :

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  17. van't Hoff equation is

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  18. If G^(@) gt 0 for a reaction then

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  19. The equilibrium constant for a reaction is 10. What will be the value ...

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  20. When the value of entropy is greater then the ability for useful work ...

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