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Combined Science: Chemistry

GCSE · Edexcel · higher

QuestionsFlashcards

Group 1
- Group 1 (Alkali Metals)
  5
- Group 1: Reactivity & Electronic Configurations
  3
Group 7
Group 0

Reaction Profiles Flashcards

All 4 cards in this deck

Explain the term activation energy.: The minimum amount of energy that colliding particles must have for a reaction to occur.
How is the activation energy shown on a reaction profile?: An arrow from the reactants' energy level up to the peak of the curve, labelled activation energy.
On a reaction profile for an exothermic reaction, how do the energy levels of the products and reactants compare?: The products line is lower than the reactants line, so the energy change is negative.
True or false? On a reaction profile for an endothermic reaction, the products are at a lower energy level than the reactants.: False. The products have more energy than the reactants, so the energy change is positive.