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The standard enthalpy of formation (Delt...

The standard enthalpy of formation `(Delta_(f)H^(@))` at `298K ` for methane `(CH_(4(g)))` is `-74.8kJ mol^(-1)`. The additional information required to determine the average energy for `C-H` bond formation would be `:`

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The standard enthalpy of formation ( DeltaH_(f)^(@)) at 398 K fir methane , CH_(4(g)) is 748 KJ mol^(-1) . The additional information required to determine the average energy for C-H bond formation would be :

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