Hess' Law (AQA A-Level Chemistry): Flashcards

Total enthalpy change same regardless of route taken

Energy conservation

Initial and final conditions must be the same

Calculates $\Delta H$ that can't be measured directly

Cycle connecting different reaction routes

Common method for applying Hess' Law

Represent enthalpy changes for reaction stages

Values are added

Values are subtracted

As vectors (directional)