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`CH_4` एव `C_(2)H_(6)` की वियोजन उर्जाये क्रमशः 360 किलो - जूल/मोल तथा 620 किलो - जूल/ मोल है `C-C` बांध की बांध ऊर्जा कीजिय |

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दिया है,
`CHJ_4toC(g)+4H(g)," "DeltaH=360` किलो - जूल
`C_2H_6to 2C(g)+6H(g)," "DeltaH=620` किलो - जूल
`because DeltaH_(CH_(4))=4xxe_(C-H)
" `":." "e_(C-H)=360/4=90` किलो - जूल
`because" "DeltaH_(C_(2)H_(6))=e_(C-C)+6xxe_(C-H)`
`620=e_(C-C)+6xx90`
`rArr" "e_(C-C)=80` किलो - जूल

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