Edexcel IAL Chemistry AS 6.2 Exothermic and endothermic signs
Edexcel IAL Chemistry AS 6.2 Exothermic and endothermic signs
Identify whether the reacting system releases or absorbs heat, assign the sign of enthalpy change and connect the energy balance to the observed temperature or process demand.
How this is tested
- Link negative enthalpy change to heat released and positive change to heat absorbed.
- Use temperature or process-energy evidence to classify an exothermic or endothermic reaction.