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If x(1) , x(2) and x(3) are enthalpies o...

If `x_(1)` , `x_(2)` and `x_(3)` are enthalpies of `H-H` , `O=O` and `O-H` bonds respective, and `x_(4)` is the enthaply of vaporisation of water, estimate the standard enthalpy opf combustion of hydrogen.

A

`x_(1) + (x_(2))/(x_(1)) - 2 x_(3) + x_(4)`

B

`x_(1) + (x_(2))/(2) - 2x_(3) - x_(4)`

C

`x_(1) + (x_(2))/(3) - x_(3) + x_(4)`

D

`2x_(3) - x_(1) - (x_(2))/(2) - x_(4)`

Text Solution

Verified by Experts

The correct Answer is:
B
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MOTION-THERMOCHEMISTRY -EXERCISE - 2 (LEVEL - I)
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  2. The reaction CH(4) (g) + Cl2 (g) to CH(3) Cl (g) to HCl (g) has Delta ...

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

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  8. From the following data at 25^(@) C {:("Reaction" ,, Delta(r) H^(@) ...

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  9. The latent heats of fusion in J g^(-1) of five substances a (mol.mass ...

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  10. For the process, melting of ice at 260 K the Delta H is -

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  11. The value of Delta H^(@) for the reaction Cu^(+) (g) + I^(-) (g) to Cu...

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  12. The heat of neutralisation is constant when dilute solution of

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  13. How much heat is liberated when 100 mL of 0.1 M NaOH are completely ...

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  14. Heat of neutralisation of HF is :

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  15. How many kcal of heat is evolved by the complete neutralisation of one...

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  16. Heat of neutralisation of NaOH and HCl is -57.46 kJ // equivalent. The...

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  17. 50.0 mL of 0.10 M HCl is mixed with 50.0 mL of 0.10 M NaOH. The soluti...

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  18. The enthalpy of neutralisation of a weak acid in 1 M solution with a s...

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  19. The enthalpy of neutralization of NH(4)OH and CH(3)COOH is – 10.5 kcal...

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  20. The heat produced by complete neutralisation of 100 ml of HNO(3) with ...

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