Edexcel IAL Chemistry AS 6.3 Enthalpy level diagrams
Edexcel IAL Chemistry AS 6.3 Enthalpy level diagrams
Place species on labelled horizontal levels, draw the enthalpy-change arrow in the correct direction with sign and units and identify any activation-energy arrow separately.
How this is tested
- Draw reactant and product levels correctly for exothermic or endothermic changes.
- Label the enthalpy-change arrow with direction, value, sign, units and species.
- Distinguish overall reaction enthalpy from activation energy on diagrams with intermediates.