The standard enthalpy of formation (ΔfH°) at 298 K for methane, CH4(g), is –74.8 kJ mol–1. The additional information required to determine the average energy for C – H bond formation would be
the dissociation energy of H2 and enthalpy of sublimation of carbon
latent heat of vaporization of methane
the first four ionization energies of carbon and electron gain enthalpy of hydrogen
the dissociation energy of hydrogen molecule, H2