The standard enthalpy of formation ( Δ f H ∘ ) at 298 K for methane, CH 4 ( g ) , is − 74.8 kJ mol − 1 . The additional information required to determine the average energy for C − H bond formatio

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The standard enthalpy of formation ( Δ f ​ H ∘ ) at 298 K for methane, CH 4 ​ ( g ) , is − 74.8 kJ mol − 1 . The additional information required to determine the average energy for C − H bond formation would be

TestHub · Accepted Answer

To determine the average C-H bond energy, we need the enthalpy of formation of methane, the enthalpy of atomization of carbon (sublimation), and the dissociation energy of H₂. These values allow us to calculate the energy required to break all bonds in methane into gaseous atoms, from which the average C-H bond energy can be derived.

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