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Energetics & Rates . GCSE REVISION. 1. What is the Minimum Amount of Energy  needed for a Reaction called?. Activation Energy. 2. Give three ways of Increasing the Rate of a Reaction. . Increase concentration Increase temperature Increase surface area Use a catalyst (any three).

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energetics rates

Energetics & Rates

GCSE REVISION

2 give three ways of increasing the rate of a reaction
2. Give three ways of Increasing the Rate of a Reaction.
  • Increase concentration
  • Increase temperature
  • Increase surface area
  • Use a catalyst

(any three)

3 what happens if you increase the temperature
3. What happens if you Increase the Temperature?
  • Particles gain kinetic energy
  • Particles move faster
  • More successful collisions
  • Faster rate of reaction
4 what happens if you increase the concentration
4. What happens if you Increase the Concentration?
  • More particles present
  • Greater chance of successful collision
  • Faster rate of reaction
5 what is a catalyst

5. What is a Catalyst?

Speeds up a chemical reaction without being used up itself

6 write the equation for the decomposition of hydrogen peroxide

6. Write the Equation for the Decomposition of Hydrogen Peroxide.

Hydrogen Peroxide Water + Oxygen

8 what does exothermic mean
8. What does Exothermic mean?
  • Chemical reaction which gives out heat energy
11 why is the heat energy given a negative sign for an exothermic reaction
11. Why is the heat energy given a negative sign for an Exothermic Reaction?
  • a) One which dissociates (breaks up) fully into ions when aqueous
  • b) HCl (aq) H2SO4(aq)