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The bond energy of C-H bond in CH(4) fro...

The bond energy of C-H bond in `CH_(4)` from the following data:
`C_((s))+4H_((g)) rarr CH_(4(g)), Delta H =-1398` kcal is about

A

`+397.8` kcal

B

`-198.9` kcal

C

`349.5` kcal

D

`+99.45` kcal

Text Solution

Verified by Experts

The correct Answer is:
C
Dissociation reaction of `CH_(4(g))` is
`CH_(4(g))rarrC_((g))+4H_((g))" "Delta H=+1398 kCal`
In methane there are 4 C-H bonds.
`therefore` Bond energy of C-H bond `=(Delta H_("Dissociation"))/(4)`
`=(1398)/(4)=349.5 kcals`
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