Science X Flashcards
(18 cards)
What is a rate of reaction
How quickly reactant are turned into products
What happens if the rate of reaction happens quickly
You have a high rate of reaction
What happens if the rate of reaction takes a long time
You have a slow rate of reaction
What is an example of a slow reaction
Rusting
What is an example of a fast reaction
Explosion
Why do things react in the first place
Things will only react if the particles collide with enough energy to cause an effective collision
What are the factors that can effect a rate of reaction
There are several factors that can effect the rate of a chemical reaction, however it essentially boils down to increasing the amount of successful collision
What is a catalysts
A catalysts is a substance that speed up the rate of reaction (without being used up themselves.) They work by lowering the activation energy
What are the names of the factors effecting the rate of reaction
Temperature, pressure, connection, surface area and catalysts
What are reversible reactions
Reversible reactions are that will react in both directions. This means that as quickly as products are formed they can be turned back into reactions. Reversible resections are identifiable by the arrow in the middle of the reaction
How do you calculate the rate of reaction
Mean rate of reaction = quantity of reactant used/time taken
Mean rate if reaction = quantity of product formed/time taken
What happens if the line curves on a graph
This means that the rate of reaction changes as it progress
What is the equation for a revivable reaction
N2 + 3H2 = 2NH3
What happens if there is a low collision
There will be no reaction
What happens if there is a high energy collision
This means that there will be more CO2 formation
How does temperature affect the rate of reaction
Temperature: The hotter the particles are, the faster they move and therefore the frequency of successful collisions is greater
How does pressure and connection affect the rate of resection
Pressure and connection: More particles in the same space means that collisions happen with much greater frequency
How does surface area affect the rate of reaction
Surface area: If there are mote particles exposed to the reaction then the frequency of successful collision is greater
