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The enthalpy of the reaction H(2)O(2) (...

The enthalpy of the reaction `H_(2)O_(2) ("?") to H_(2) O ("?") + 1//2 O_(2) (g)` is `-23.5 kcal mol^(-1)` and the enthalpy of formation of `H_(2) O` (?) is -68.3 kcal `mol^(-1)` . The enthalpy of formation of `H_(2) O_(2)` (?) is -

A

`-44.8` kcal `mol^(-1)`

B

`44.8` kcal `mol^(-1)`

C

`-91.8` kcal `mol^(-1)`

D

`+91.8` kcal `mol^(-1)`

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The correct Answer is:
A
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MOTION-THERMOCHEMISTRY -EXERCISE - 2 (LEVEL - I)
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  9. From the following data, the heat of formation of Ca(OH)(2 (s)) at ...

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  10. Given that DeltaH(" comb ") of cyclopropane is -4000 kJ mol^(-1) . The...

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  13. Calculate the bond energy of C-H bond from the following data : (a) ...

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  16. For the reaction, bond energies are given as under – (i) C—C,...

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  17. The heat of combustion of ethylene C(2) H(4) (g) is - 1420 kJ/mole . T...

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  18. The reaction CH(4) (g) + Cl2 (g) to CH(3) Cl (g) to HCl (g) has Delta ...

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  19. If x(1) , x(2) and x(3) are enthalpies of H-H , O=O and O-H bonds resp...

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  20. Delta(r) H of which of the following reactions is zero ?

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