Match the columns — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

(A) Represents strictly the heat of combustion of diamond. (B) Represents both the heat of combustion of graphite and the standard heat of formation of $\text{CO}_2$. (C) Represents the standard atomization of hydrogen, which maps exactly to the single bond dissociation enthalpy. (D) Represents the standard atomization of methane, which is the sum of four bond enthalpies, not a single nominal bond enthalpy.