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For a reaction, A(2) + B(2) hArr 2AB, De...

For a reaction, `A_(2) + B_(2) hArr 2AB, DeltaG and DeltaS` values are 20 kJ/mol and `-20` J/K/mol respectively at 200k. `DeltaC_(P) " is " 20 JK^(-1)`. Then identify the correct property of the reaction.

A

The reaction is spontaneous at 200k and `DeltaH` at that temperature is 20kJ/mol

B

The reaction is exothermic and `DeltaH` at 200k is 22 kcal/mol

C

`DeltaS` of the reaction is zero and `DeltaH` of the reaction is 440J/mol at 400k

D

The reaction is endothermic and `DeltaH` of the reaction is 20kJ/mol at 400k

Text Solution

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The correct Answer is:
D
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AAKASH SERIES-CHEMICAL THERMODYNAMICS-Practice Sheet- Exercise-III
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  2. Pick out the correct statement from among the four:

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  3. For a reaction, A(2) + B(2) hArr 2AB, DeltaG and DeltaS values are 20 ...

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  4. Statement-I Due to adiabatic free expansion, temperature of a real gas...

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  5. Which of the following process has negative value of DeltaS?

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  6. Some statements are given with regard to entropy. The incorrect statem...

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  7. 2H(2(g)) + O(2(g)) rarr 2H(2)O((l)) , DeltaH= -ve and DeltaG= -ve. The...

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  8. Based on the third law of themodynamics, the entropy can be obtained u...

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  9. When charcoal burns in air signs of DeltaH and DeltaS "are " 2C((s)) +...

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  10. DeltaS("surr") " for " H(2) + 1//2O(2) rarr H(2)O, DeltaH -280 kJ at 4...

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  11. The direct conversion of A to B is difficult, hence it is carried out ...

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  12. The incorrect statement according to second law of themodynamics is

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  14. Which processes involve increase in entropy?

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  15. Which statements are correct as per laws of thermodynamics?

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  16. For A rarr B, DeltaH= 3.5 kcal mol^(-1), DeltaS= 10 cal mol^(-1) K^(-1...

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  17. The change in Gibbs free energy of the system along provides a criteri...

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  18. The change in Gibbs free energy of the system along provides a criteri...

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  19. The thermodynamic property that measures the extent of molecular disor...

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  20. The thermodynamic property that measures the extent of molecular disor...

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