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Given (at 25^(@)C): C (s, graphite)toC...

Given (at `25^(@)C`):
C (s, graphite)`toC(g),DeltaH^(0)=+713.64kJmol^(-1)`
`(1)/(2)H_(2)(g)toH(g),DeltaH^(0)=+218kJ*mol^(-1)`
6C(s, graphite)`+3H_(2)(g)toC_(6)H_(6)(g),DeltaH^(0)=+82.93kJ*mol^(-1)`
At `25^(@)C`, if the energy of C_H and C-C bonds are 418 and 347 `kJ*mol^(-1)` respectively, then the `C=C` bond energy is-

A

`+679.8kJ*mol^(-1)`

B

`+652.63kJ*mol^(-1)`

C

`+808.75kJ*mol^(-1)`

D

`+763.39kJ*mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
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