# How are standard bond enthalpy values experimentally produced?

The question's essentially it. I've always wondered about how these values are produced, since we refer to them heaps in the lab to assess our experimental results, but I don't actually know how they're produced.

• Probably via calorimetry? – Zhe Oct 26 '16 at 21:25

The average value of the gas-phase bond dissociation energies (usually at a temperature of $298\ \mathrm{K})$ for all bonds of the same type within the same chemical species.
There are a variety of ways to measure bond dissociation energies through bond cleavage—by irradiating the molecule with electromagnetic waves, bombarding it with a beam of electrons, measuring the equilibrium constant of the reaction $\ce{A-B <=>A. + B \cdot}$, or by measuring the rate by which a radical reaction proceeds$^{[1]}$.