CHEMISTRY / THERMOCHEMISTRY
Estimate reaction enthalpy from summed average bond energies broken and formed. Inspect the chemical relationship, substituted values, result, assumptions, and unit convention in one guided workspace.
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Estimate reaction enthalpy from summed average bond energies broken and formed. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.
Delta H approximately sum E_broken - sum E_formed
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Average gas-phase bond enthalpies are approximations and may not represent molecular environment or phase effects.
Use internally consistent units and retain extra precision when carrying the result into another calculation.
Reviewed reference factors