1.1 Chemical changes and structure Flashcards
What are the 4 things that affect rate of reaction?
- Temperature
- Concentration
- Surface area
- Catalyst (Not used thou!!)
Why does temperature increase the rate of reaction?
Increases the energy of particles so are more likely to collide
(Temperature is a measurement of how fast particles are moving)
Why does concentration increase the rate of reaction?
More likely to collide as there are more of them
Why does an increase in surface are increase the rate of reaction?
particles are bigger so are more likely to collide
Why do catalysts increase the rate of reaction?
Lower the activation energy of a reaction by producing alternative pathways (ARE NOT USED UP IN A CHEMICAL REACTION!!!!)
What happens to the rate of reaction when temperature is increased?
Rate increases
What happens to the rate of reaction when temperature is decreases?
Rate decreases
Why are catalysts used in industry?
Save energy so therefore save money
Rate of reaction calculation
rate=Change in quantity/change in time
