amount of energy at the end of the reaction is the same before the reaction takes place 

a reaction where energy is released to the surroundings

combustion, oxidation and neutralisation 

a reaction where energy is taken in from the surroundings 

a graph showing the energy of reactants and products with activation energy needed for the reaction to start 

energy of reaction = sum of bonds broken - sum of bonds made

cheap, some are rechargeable, reliable source of energy 

disadvantages of using cells and batteries 

reactants are used up and cannot be recharged 

fuel and oxygen are oxidised to make electricity 

reaction in hydrogen fuel cells (cathode)

reaction in hydrogen fuel cells (overall)

recharging is not needed and no pollutants (water is the only product)

flammable, hydrogen is hard to store safely, expensive to produce 

English (UK)

year 10 and 11

flashcards on the topic of energy changes (there is some higher tier content in this set)

Revision note

Bernice

United Kingdom

DEFAULT (England)

Chemistry

AQA Chemistry - Energy Changes Flashcards 

For Year 10 and 11! Get your AQA GCSE Chemistry flashcards with all the Energy Changes you need. Includes exam style questions, Foundation answers, bond energy questions, and more. Higher tier notes for free! Great for revision - like having the answers in your pocket.

GCSE Chemistry Energy Changes Flashcards | AQA Unit 5.5 Notes & Questions

Flashcards

GCSE Chemistry Energy Changes Flashcards | AQA Unit 5.5 Notes & Questions

Flashcards