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

Text Solution

Verified by Experts

The correct Answer is:
D
`C_(8)H_(18(l))+12.5O_(2(g))rarr8CO_(2(g))+9H_(2)O_(l)`
`DeltaH=DeltaE+(8-12.5)xx8.31xx0.298` in `KJ//mol`
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A2Z-CHEMICAL THERMODYNAMICS-Section D - Chapter End Test
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