C8-Rate Of Reaction Flashcards
What is rate of reaction
The rate in which how quickly particles react with eacother
How to calculate rate of reaction over a given time
Rate of reaction=amount of reactant used/time
Rate of reaction=amount of product formed/time
Mean rate of reaction
Change in concentration/time
How can a surface area of a solid be increased?
A solid can be turned into a powder
How does changing the surface area affect rhe rate of reaction?
We can see affecting the surface area increases the rate of reaction as it gives particles more space in order to react.Increasing the amount of collisions within a given time therefore increasing the rate of reaction.
use collision theory to explain in detail how increasing surface area increases the rate of reaction.
We can see that collision theory is the theory that particles must collide with a greater then energy than the activation and in the correct orientation so we csn see when the surface area is increased it allows for more area in order for particles to react so they are easly able to pass the activation energy,increasing its rate of reaction.
Define collision theory
Collision theory states that chemical reactions occur only when the reactant particles collide with sufficient energy to react.
Units of rate of reaction
G/s or g/min
cm^3/s or cm^3/min
Why is there more then 1 unit for rate of reaction
There is more then one unit as there is different measurements such as amount of producted formed or volume of product formed which is measured in cm^3/s
What is activation energy?
The minimum energy particles need in order to complete a succesful reaction.
How to calculate surface area to volume ratio
Surface area/volume
explain why many collisions do not lead to a chemical reaction.
They are either not in the correct orientation or do not have enough energy to surpass the activation energy.
How does temperature affect rate of reaction
Temperature affects rate of reaction as temperature gives particles enough energy to surpass the activation energy and this temperature allows the particles to react faster leading to more frequent collisions leading to a greater rate of reaction over a certain time.
describe how changing concentration affects the rate of reaction.
As concentration increases, particles are closer together, leading to more frequent collisions. This increases the number of successful collisions per unit of time, resulting in a greater rate of reaction.”
use collision theory to explain how changing concentration or pressure alters the rate of reaction.
If the concentration of a rate is increased, there are more reactant particles for a given volume. There will be more collisions and so the reaction rate is increased. The higher the concentration of reactants, the faster the rate of a reaction will be.
