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For the combustion of n-octane C(8)H(1...

For the combustion of n-octane
`C_(8)H_(18)+O_(2)rarrCO_(2)+H_(2)O` at `25^(@)C` (ingnoring resonance in `CO_(2)`)

A

`DeltaH=DeltaE-5.5xx8.31xx0.298` in `KJ//mol`

B

`DeltaH=DeltaE+4.5xx8.31xx0.298` in `KJ//mol`

C

`DeltaH=DeltaE-4.5xx8.31xx0.298` in `KJ//mol`

D

`DeltaH=DeltaE-4.5+8.31xx0.298` in `KJ//mol`

Text Solution

Verified by Experts

The correct Answer is:
A
`C_(8)H_(18(l))+12.5O_(2(g))rarr8CO_(2(g))+9H_(2)O_((l))`
`DeltaH=DeltaE+(8-12.5)xx8.31xx0.2981` in `KJ//mol`
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A2Z-CHEMICAL THERMODYNAMICS-Section D - Chapter End Test
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  9. Given,H(s)(g)=2H(g)Delta(H-H)=103kcalmol^(-1) CH(4)(g)=CH(3)(g)+H(g...

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  10. For the combustion of n-octane C(8)H(18)+O(2)rarrCO(2)+H(2)O at 25^(...

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  11. The enthapies of neutralisation of HClO(4)and Cl(3)C-COOHare -13.5kc...

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  12. The work done in erge for the reversible expansion of 1 mole of an ide...

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  14. The enthalpy of formation of H(2)O(l) is -280.70 kJ/mol and enthalpy o...

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  16. Calculate the resonance enegry of N(2)O form the following data Delt...

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  17. If a 298K the bond energies of C-H,C-C,C=C and H-H bonds are respectiv...

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  19. "The quanity of heat which must be supplied to decompose a compound in...

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  21. Which of the follwing has lowest fusion temperature ?

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