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The enthalpy of combustion of propane (C...

The enthalpy of combustion of propane `(C_(3)H_(8))` gas in terms of given data is :
Bond energy (kJ/mol)
`{:(epsilon_(C-H),epsilon_(O=O),epsilon_(C=O),epsilon_(O-H),epsilon_(C-C)),(+x_(1),+x_(2),+x_(3),+x_(4),+x_(5)):}`
Resonance energy of `CO_(2)` is`-z kJ//mol` and `DeltaH_("vaporization")[H_(2)O(l)]" is y " (kJ//mol)`

A

`8X_(1)+2X_(5)+5X_(2)-6X_(3)-8X_(4)-4Y-3Z`

B

`6X_(1)+X_(5)+5X_(2)-3X_(3)-4X_(4)-4Y-3Z`

C

`8X_(1)+2X_(5)+5X_(2)-6X_(3)-8X_(4)-Y-Z`

D

`8X_(1)+X_(5)+5X_(2)-6X_(3)-8X_(4)-4Y+3Z`

Text Solution

Verified by Experts

The correct Answer is:
A
`C_(3)H_(8) (g) + 5O_(2) rarr 3CO_(2)(g) + 4H_(2)O(l)`
`Delta_(c)H={:[(8xxB.E. (C-H)), (+2xx B.E. (C-C)),(+5xxB.E.(O=O))]:} - {:[(6xxB.E. (C=O)), (+8xx B.E. (O-H)),(+3xx|R.E.|of(CO_(2))),(+4xxDelta_("vap")H(H_(2)O))]:}`
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