Chemistry · Reactivity 1: What drives chemical reactions?

R1.2 — Energy cycles in reactions

Chemistry · SL / HL · syllabus-mapped notes

1. Bond enthalpies

   Calculating enthalpy changes from average bond enthalpies, and why they are averages.

2. Hess’s law

   Using Hess’s law to find enthalpy changes in multistep reactions.

3. Formation, combustion data and Born–Haber cycles

   Using ΔHf and ΔHc data, and interpreting Born–Haber cycles.