1.2 Energy cycles
- Syllabus
- First assessment 2025
- Topic
- 1.2
- Level
- SL
Objective notes
2 learning objectives• Bond-breaking absorbs energy
• Bond-forming releases energy
• Calculate enthalpy change from average bond enthalpies
• Enthalpy change independent of pathway
• Apply Hess's law to multistep reaction cycles
ConceptIB Chemistry SL