Enthalpy change when one mole of a compound is formed from its elements in standard states. Elemental standard states have Δ_f H° ≡ 0 by convention. Tabulated values enable Hess's-law calculation of ΔH_rxn.
Enthalpy change when one mole of a compound is formed from its elements in standard states. Elemental standard states have Δ_f H° ≡ 0 by convention. Tabulated values enable Hess's-law calculation of ΔH_rxn.