Unit 6 · Thermochemistry

Chapter 6.3

Enthalpy of Reaction and Bond Enthalpies

Breaking bonds always costs energy and forming them always pays; a flame is just a reaction that forms stronger bonds than it breaks. Tally the bonds and you can estimate the heat before striking the match.

in preparation · lesson 27 of 45

By the end

  1. 01Compute the heat of a reaction from moles reacted and the enthalpy of reaction
  2. 02Explain where reaction heat comes from through bond breaking and bond forming
  3. 03Estimate an enthalpy of reaction from average bond enthalpies

In unit 6

  1. 6.1Endothermic, Exothermic, and How Heat Actually Moves
  2. 6.2Calorimetry and the Energy of Phase Changes
  3. 6.3Enthalpy of Reaction and Bond Enthalpies
  4. 6.4Enthalpies of Formation and Hess's Law
RELUE© MMXXVI

AP® is a registered trademark of the College Board, which was not involved in the production of, and does not endorse, this content.