Rates Of Reaction Flashcards
What are the 4 things rate if of reaction depends on?
- temperature
- pressure / concentration
- catalyst
- size of particles / surface area
Why does a higher temperature increase the rate of reaction?
When temperature the particles have more energy and move quicker. This means they collide more frequently
Why does a higher concentration increase the rate of reaction?
There are more particles of the reactant knocking about between the water molecules which makes the collisions between the important more likely
Why does a higher pressure increase the rate of reaction?
It means the particle are more squashed together so they collide more frequently
Why does a larger surface area increase the rate of reaction?
Th particles around it in the solution will have more area to work on, so there’ll be more useful collisions more often
Why does using a catalyst increase the rate of reaction?
They increase the number of successful collisions by lowering the activation energy
What is an exothermic reaction?
A reaction that gives out energy to the surroundings
What is an endothermic reaction?
A reaction which takes in energy from the surroundings
What is a reversible reaction?
Where the products can themselves react to produce the original products
Give two features of dynamic equilibrium
- Rate of forward reaction = rate of backward reaction
2. Concentration of products and reactants remain stay constant
What is equation for the haber process?
N2 + 3H2 -> 2NH3
How is the hydrogen obtained?
From the air
How is the hydrogen obtained?
From natural gas or cracking hydrocarbons
What is the pressure required for the haber process?
200 atmospheres
What is the temperature for the haber process?
450*c
