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The direct conversion of A to B is diffi...

The direct conversion of A to B is difficult, hence is carried out by the following shown path:
`Delta(AtoC)=50, DeltaS(CtoD)=30,DeltaS(BtoD)=20` The entropy change for the process `A to B` is :

A

`+100eV`

B

`+60 eV`

C

`-100eV`

D

`-60eV`

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaS(AtoC)=S_(C )-S_(A)=50eV`
`DeltaS(CtoD)=S_(D )-S_(C)=30eV`
`DeltaS(Btod)=S_(D )-S_(B)=20eV`
`DeltaS(AtoB)=S_(B )-S_(A)="eqn." (1)+"eqn."(2)-"eqn."(3)`
`=50+30-20=60eV`
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DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
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  8. Identify the correct statement regarding a spontaneous process.

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  10. For the process H(2)O(l) (1 "bar", 373 K) rarr H(2)O(g) (1"bar", 373 K...

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  13. For the gas phase reaction PCl(5)rarrPCl(3)(g)+Cl(2)(g) which of t...

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  14. Bond dissociation enthalpy of H(2) , Cl(2) and HCl are 434, 242 and 43...

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  16. The bond dissociation energy of B-F in BF(3) is 646 kJ mol^(-1) where...

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  17. From the following bond energies H-H bond energy 431.37 kJ mol^(-1) ...

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  18. The values of DeltaH and DeltaS for the reaction C("graphite")+CO(2)...

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  19. For a particular reversible reaciton at temperature T, DeltaH and Delt...

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  20. The standard enthalpy of formation of NH(3) is -46.0KJ mol^(-1) . If t...

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