- Temperature decreases โ the reaction mixture and surroundings get colder
- Energy is absorbed โ transferred from surroundings into reaction
- ฮH is positive โ enthalpy (energy change) is greater than zero (e.g., ฮH = +178 kJ/mol)
- Energy profile goes up โ products higher than reactants on diagram
- Everyday uses: Sports cold packs, some cooking processes
- Often need continuous heating โ thermal decomposition requires heat input
This key facts covers Key Facts: Endothermic Reactions within Endothermic Reactions for GCSE Chemistry. Revise Endothermic Reactions in Energy Changes for GCSE Chemistry with 20 exam-style questions and 14 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 7 of 12 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Endothermic Reactions
In an endothermic reaction, energy is:
Explain why a sports cold pack becomes cold when activated.
Quick recall flashcards
What does "endo" mean?
Inside โ energy enters from surroundings
What is an endothermic reaction?
A reaction that absorbs/takes in energy from the surroundings