The dissociation energy of `CH_(4) and C_(2)H_(6)` are respectively 1508 and `2594 kJ mol^(-1)` respectively. The bond energy of C-C bond is

Options

A. `332 kJ mol^(-1)`
B. `316 kJ mol^(-1)`
C. `806 kJ mol^(-1)`
D. `320 kJ mol^(-1)`

Answer

A

Explanation

For methane,
`4 Delta H_(C-H) = 1508 kJ`
:. `Delta H_(C-H) = (1508)/(4) = 377 kJ`
For dissociation of enthane, `H- underset(underset(H)(|))overset(overset(H)(|))(C) - underset(underset(H)(|))overset(overset(H)(|))(C)-H`
`Delta H_(C-H) + 6 Delta H_(C-H) = 2594 kJ`
`Delta H_(C-H) + 6 xx 377 = 2594`
`Delta H_(C-H) = 2594 - 6 xx 377`
= 332 kJ