Energy ChangesTopic Summary
Topic Summary: Endothermic Reactions
Part of Endothermic Reactions — GCSE Chemistry
This topic summary covers Topic Summary: 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 regularly enough that it should still be part of a steady revision cycle. It is section 12 of 12 in this topic. Use this topic summary to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 12 of 12
Practice
20 questions
Recall
14 flashcards
Topic Summary: Endothermic Reactions
Key Terms
- Endothermic — absorbs energy from surroundings
- ΔH — positive for endothermic reactions
- Thermal decomposition — breakdown by heat
- Photosynthesis — key endothermic example
- Reversible reaction — reverse has opposite ΔH sign
Must-Know Facts
- Temperature of surroundings DECREASES
- Products have MORE energy than reactants
- ΔH is POSITIVE
- Products are HIGHER on energy profile
- Examples: photosynthesis, thermal decomposition
- Energy needed breaking bonds > energy released making bonds