C5.2 Flashcards
Instantaneous rate of reaction
The rate of reaction at a particular point in time
A tangent must be drawn
Mean rate of reaction
The rate of reaction between two points
A triangle can be used
Rate of reaction
A measure of how quickly reactants are used up, or how quickly products are formed
Gas syringe
The most efficient piece of equipment to measure the volume of a gas
It’s made from glass, has graduations marked in cm3, and as the syringe fills the plunger is pushed outwards
A reaction requires two things:
The reactant particles must collide with each other
Both particles must, at least, have the activation energy needed to react
Successful reaction
A collision that leads to a reaction
As temperature increases, the rate of reaction increases because…
More kinetic energy means particles move more quickly
Therefore they collide more often
A greater proportion will have the activation energy
As concentration increases, the rate of reaction increases because…
The particles are more crowded as there is a higher number of them in the same space
As pressure increases, the rate of reaction increases because…
The particles are more crowded as there are the same number of them in a smaller space
As surface area increases, the rate of reaction increases because…
More particles are available to collide
Using a catalyst increases the rate of reaction because…
It finds a reaction pathway with a lower activation energy, so a higher proportion of collisions will be successful
