Below are some useful videos and a knowledge organiser for revising the C5 Chemistry topic on Energy Changes.
Bitesize GCSE Chemistry
Bitesize Combined Science
Endothermic & Exothermic Reactions
Reaction profile diagrams
Energy changes RP
Bond energy calculations
Resources for use in school (not YouTube)
Questions which are aimed at Grades 1-4
Questions which are aimed at -Grades 7-9