Chemistry Topic 5a-8 Flashcards
What is rate of reaction?
It measures how quick a reaction takes place
Hwo do you calculate rate of reaction?
Amount of reactant used or amount formed
Time
What are the 3 ways that rate of reaction can be measured?
Precipitation
Chnage in mass
Volume of gas given off
How do you calculate the graident?
Change in Y
Change in X
What dows the rate of a chemical reaction depend on?
Collision frequency, the more the quicker the reaction
The energy transfered during a collision, this is called activation energy
What are 3 things that increase rate of reaction?
Increasing temperature
Increasing concentration or pressure
Larger surface area to volume ratio
Why does temperature increase rate of reaction?
It makes the particles move faster and therefore perform more collisions
Why does increasing the concentration or pressure increase the rate of reaction?
It means that there are more particles in the same volume so collisions will occur more frequently
Why would increasing the surfact area to volume ratio increase rate of reaction?
The particles will have more area to work on so more collisions will occur
