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For the gas phase reaction, PCl(5)(g) ...

For the gas phase reaction,
`PCl_(5)(g) hArr PCl_(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 that bond energies of H–H and Cl–Cl are 430 kJ mol^(-1) and 240...

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  2. Bond dissociation enthalpy of H(2), Cl(2) and HCl are 434, 242 and 431...

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  3. For the gas phase reaction, PCl(5)(g) hArr PCl(3)(g) + Cl(2)(g) Wh...

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  4. Which of the following are not a constant value between two given ther...

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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 DeltaH and DeltaS for the reaction, C("graphite")+CO(2...

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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 vaccum. The wo...

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  9. The following two reactions are known : Fe(2)O(3)(s) + 3 CO(g) rightar...

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  10. Standard entropies of X(2), Y(2) and XY(3) are 60, 40 and 50 JK^(–1) m...

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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 enthalpy change for the transition of liquid water to steam is ...

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  15. Enthalpy change for the reaction, 4H(g) to 2H2(g) is -869.6 kJ Th...

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

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  17. Consider the following processes : {:(,DeltaH(kJ//"mol")),(1/2ArarrB...

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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 thermodynamical function /

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