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A hypothetical reaction, A rarr 2B, proc...

A hypothetical reaction, `A rarr 2B`, proceeds via following sequence of steps
`{:(ArarrC,,DeltaH = q_(1),,,),(CrarrD,,DeltaH = q_(2),,,),((1)/(2)D rarrB,,DeltaH = q_(3),,,):}`
The heat of reaction is

A

`q_(1)-q_(2)+2q_(3)`

B

`q_(1)+q_(2)-2q_(3)`

C

`q_(1)+q_(2)+2q_(3)`

D

`q_(1)+2q_(2)-2q_(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
Multiply eqn. `(iii)` by `2` and add all the three.
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DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. Hess's law states,

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  2. Which of the following statements relationship is not correct?

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

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  4. 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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  5. Enthalpy of formation of compound is

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

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

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

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  9. The enthalpy combustion of a substance

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

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

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

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

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  14. When a solid melts there is

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

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

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

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

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

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  20. Which of the following statements is correct?

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