Y9 - Particle theory and rates of reaction
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When water is boiling, what are the bubbles?
Water particles that are starting to boil
How do liquid particles move?
Liquid particles slide over each other
How do solid particles move?
Solid particles vibrate on the spot
What weakens when heated?
forces of attraction
How do gases move?
In random, straight lines
What is collision theory?
The study of rate of reactions and how to predict it, and increase it.
What are the different ways to increase the rate of reaction?
By adding a catalyst, increasing the surface area, increasing the concentration, heating the particles up, using a larger mass of reactants
What does adding a catalyst do?
Provide an alternate route for the reaction to take place, which has a lower activation energy
What does increasing the surface area do?
increases the number of collisions
What does increasing the mass of a reactant do?
increase the number of collisions
What does heating the reactants do?
Transfer the energy into kinetic energy which leads to more collisions and more chances of succesful collisions because there is more energy
What does increasing the concentration do?
increase the number of collisions
What is the activation energy?
The minimum quantity of energy needed for a reaction