The bond dissociation energy is the energy required to break a specific chemical bond, in this case, the carbon-hydrogen bond in methane CH4 . Since methane has 4 C-H bonds, we need to calculate the energy required to break one of these bonds.The bond enthalpy of the C-H bond is given as 413 kJ/mol. This value represents the energy required to break one mole of C-H bonds. To find the bond dissociation energy for a single C-H bond in methane, we can simply use the given bond enthalpy value.The bond dissociation energy of the carbon-hydrogen bond in methane CH4 is 413 kJ/mol.