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For the gas phase reaction PCl(5)rarrP...

For the gas phase reaction
`PCl_(5)rarrPCl_(3)(g)+Cl_(2)(g)`
which of the following conditions are correct?

A

`Delta H lt 0` and `Delta S lt 0`

B

`Delta H gt 0` and `Delta S lt 0`

C

`Delta H = 0` and `Delta S lt 0`

D

`Delta H gt 0` and `Delta S lt 0`

Text Solution

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The correct Answer is:
D
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ALLEN-THERMODYNAMICS -EXERCISE -1A
  1. Given the bond energies of H - H and Cl - Cl are 430 kJ mol^(-1) and 2...

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

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

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  4. Which of the following are not state functions? (I) q+w (II)q (I...

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  5. From the following bond energies: H--H bond energy: 431.37KJmol^(-1) ...

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  6. The values of Delta H and Delta S for the reaction are 170 kJ and 17...

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  7. For vaporization of water at 1 atmospheric pressure the values of Delt...

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  8. Three moles of an ideal gas expanded spontaneously into vacuum. The wo...

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  9. The following teo reaction are known : Fe(2)O(3)(s)+3CO(g)rarr2Fe(s)...

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  10. Standard entropy of X(2) , Y(2) and XY(3) are 60, 40 and 50JK^(-1)mol...

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  11. Intensive property is :-

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  12. In which of following there is decrease in entropy :-

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  13. Which of the following is not a state function :-

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  14. If the enthaply change for the transition of liquid water to steam is...

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  15. Enthalpy change for the reaction, 4H((g))rarr 2H(2(g)) is -869.6 kJ ...

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  16. Which of the following is the correct option for the free expansion of...

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  17. Consider the following processes :- {:(,DeltaH(kJ//mol)),((1)/(2)A r...

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  18. The enthalpy of formation of CO(g), CO(2)(g),N(2)O(g) and N(2)O(4)(g) ...

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  19. For adiabatic process which is correct -

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  20. Which of the following is not thermodynamic function -

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