Hess's law: The total enthalpy change for a reaction is the sum of enthalpy changes for the individual steps, regardless of pathway.
How to apply it: Apply Hess's law to calculate ΔH for a reaction by combining known thermochemical equations.
Course: AP Chemistry · Unit: Thermodynamics
Practice questions about Hess's law on AimFive — get rubric-based feedback showing exactly which points you earned.
AP and Advanced Placement are trademarks of College Board. AimFive is not affiliated with or endorsed by College Board.