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N(2)(g) +2O(2)(g) rarr 2NO(2)(g) +X kJ ...

`N_(2)(g) +2O_(2)(g) rarr 2NO_(2)(g) +X kJ`
`2NO(g)+O_(2)(g) rarr 2NO_(2) +Y kJ`
The enthalpy of formation of `NO` is

A

`(2X-2Y)`

B

`X-Y`

C

`(1)/(2)(Y-X)`

D

`(1)/(2)(x-y)`

Text Solution

Verified by Experts

The correct Answer is:
D
Multiply both the reactions by `(1)/(2)` and subtract first equation from `2nd`.
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DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. Which of the following statements relationship is not correct?

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  2. A hypothetical reaction, A rarr 2B, proceeds via following sequence of...

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  3. N(2)(g) +2O(2)(g) rarr 2NO(2)(g) +X kJ 2NO(g)+O(2)(g) rarr 2NO(2) +Y...

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  4. Enthalpy of formation of compound is

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  5. The value of DeltaH for the process given below, NH(4)OH(aq)toNH(4)^(+...

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  6. i. H(2)(g) +CI(2)(g)rarr 2HCI(g),DeltaH =- x kJ ii. NaCI +H(2)SO(4) ...

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  7. The reaction SO(2)(g) +1//2O(2)(g) rarr SO(3)(g) should be

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  8. The enthalpy combustion of a substance

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  9. Xg of ethanal was subjected to combustion in a bomb calorimeter and th...

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  10. The enthalpy change for the process C("(graphite)") rarr C((g)), Delta...

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  11. HA+OH^(-) to H(2)O+A^(-)+q(1) kJ H^(+)+OH^(-) to H(2)O+ q(2) kJ Th...

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  12. The heat change accompanying the reaction 2H(2)(g)+O(2)(g) to 2H(2)O...

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  13. When a solid melts there is

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  14. One gram-atom of graphite and one gram-atom of diamond were separately...

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  15. The reaction which shows heat of formation of water correctly is

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  16. Heat of formation, Delta H(f)^(@) of an explosive compound like NCl(3)...

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  17. The products of combustion of an aliphatic thiol (RSH) at 298 K are

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  18. For the transition C("(diamond)") rarr C("(graphite)"), DeltaH=-1.5 kJ...

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  19. Which of the following statements is correct?

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  20. The heat liberated in the following reaction H^(+)(aq)+OH^(-)(aq) to...

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