Edexcel IAL Chemistry AS 6.9 Bond and mean bond enthalpy
Edexcel IAL Chemistry AS 6.9 Bond and mean bond enthalpy
Draw or inspect all reactant and product bonds, calculate bonds broken minus bonds formed and distinguish a specific bond value from a mean across compounds.
How this is tested
- Calculate reaction enthalpy as total bonds broken minus total bonds formed.
- Distinguish a specific bond enthalpy from a mean value averaged across compounds.
- Explain disagreement with measured enthalpy through averaging and gas-phase assumptions.