The standard enthalpy of formation ∆fHo at 298 K for methane, CH4g, is -74.8 kJ mol-1. The additional information required to determine the average energy for C-H bond formation would be

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answer is B.

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Detailed Solution

C+2H2 →CH4 ∆fHo=eCS→g+2 × eH-H - 4 × eC-H

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