How Fast? Flashcards
What is rate of reaction?
How quickly a reactant is used up or product is produced
What is the equation for calculating mean rate of reaction?
Mean Rate= change in quantity or product
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time taken
What is the unit for rate of reaction in a reaction invlolving change of mass?
g/s
What is the unit of measurement for change in volume?
cm^3/s
What is activation energy?
The minimum energy required to start a chemical reaction
What does increasing concentration do to a chemical reaction?
Increases the rate of reaction
Why does increasing concentration increase rate of reaction?
It increase collisions
What effect does pressure do to chemical reactions?
Increases rate of reaction
Why does pressure increase rate of reaction?
There is less space between particles and therefore, more collisions
What effect does increasing surface area have on a chemical reaction?
It increases rate of reaction
Why does larger surface area increases rate of reaction?
There is more expossure to reactant particles leading to more frequent collisions
What effect does increasing temperature have on a chemical reaction?
It increases rate of reaction
Why does higher temperature increase rate of reaction?
Higher temperature increases kinetic energy, leading to more frequent collisions
What is a catalyst?
A substance that increases rate of reaction but doesnt get used up in the process
How does a catalyst increase rate of reaction?
It lowers activation energy
