Consider the following data:
$\Delta_f \mathrm{H}^{\ominus}$ (methane, g$)=-\mathrm{X} \mathrm{kJ}

Question

Consider the following data:
 $\Delta_f \mathrm{H}^{\ominus}$ (methane, g$)=-\mathrm{X} \mathrm{kJ} \mathrm{mol}^{-1}$ 
Enthalpy of sublimation of graphite $=\mathrm{Y} \mathrm{kJ} \mathrm{mol}^{-1}$ 
Dissociation enthalpy of $\mathrm{H}_2=\mathrm{Z} \mathrm{kJ} \mathrm{mol}^{-1}$
The bond enthalpy of $\mathrm{C}-\mathrm{H}$ bond is given by :

Professor PC Thomas Classes · Answer

See detailed solution for explanation.