Chemistry · GCSE
How Fast, How Far, and Which Way
What actually changes when a reaction speeds up, and why a catalyst gets you there sooner but never further. Collision theory and a rate graph read by its gradient; exothermic and endothermic profiles side by side with activation energy marked; chemical and fuel cells, with the Space Shuttle’s fuel cell photographed; the three levers that shift an equilibrium and the one that does nothing; a worked bond-energy calculation. Eight terms to define, a model answer on temperature and rate, and the misconceptions that cost marks.
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