kinetics (physical) Flashcards
What must particles do in order to react?
Collide with enough energy (activation energy) and the correct orientation
Do most collisions end in a reaction
no
Define activation energy
The minimum energy needed for particles to collide to form a reaction
What is the effect of increasing temperature on the rate of reaction? Why?
Increasing temperature = increased rate of reaction because when the particles get hotter, particles have more energy and move faster so they collide more often
What is the effect of increasing concentration/pressure on rate of reaction? Why?
Increased concentration/pressure = increased rate of reaction because there are more particles/smaller area so the particles are more likely to collide with eachother.
What is a catalyst?
A substance which increases the rate of reaction but is not actually used up
How do catalysts work and how do they increase the rate of reaction?
They provide an alternative reaction pathway (one with a lower activation energy)
Lowers the activation energy so more particles have energy and therefore there are more frequent collisions so there is an increased reaction rate
