Whats Tye Collision Theory Flashcards
What is the colllision theory
For a reaction to take place the particles must collide with enough energy to break bonds and needs to be right orientation
Have activation energy
No particles have zero energy
According to collision theory what must happens to increase rate of reaction
Increase the frequency of collisions
Of increase frequency of successful collisions
What does an increase in surface area increase reaction
Provides a large surface area for particles to react and lead to a reaction at a given time as More exposure
Catalyst have large surface area
Also shake liquids as emulsification usually form which increases surface area
How does an increase in temp increase the rate of reaction
The particles have greater kinetic energy so moveing faster and collide more often
They also gain more energy so they have the minimum activation energy to lead to successful collisions
Exam question how does the maxwell hanger and why in increase in temperature
The hill peak moves to the left and lower than original graph and the line is above
An increase in temperature it increase the energy of particles a large amount of particles have required activation or more to produce successful reaction so a small change in temperature can increase rate of reaction
Explain activation energy graphs why is there a peak
The energy system reaches a maximum
What shows an exothermic reaction
If the energy of the product fall lower than the products and downward arrow from the reactant to products
What shows endothermic
If the line for products is higher than the original reactant line the arrow facing upward label enthalpy
How does uv light affect activation energy
The uv provides energy to break the bonds as some lights increase the rate of reaction
This provides energy in order to lead to succeful reaction the initiation
An increase in light intensity has a greater effect on the increase rate
How do catalyst increase the rate of reaction
It provides a lower activation energy so more particles have the required activation energy and overcome the barrier to react so can lead to a successful reaction
How are they used in industry
To increase the rate ofrsaction when an increase in temperature will affect the yours
Special facts about catalyst
There have been research how the catalyst can be more effective as it will save much money
They need to be replaced as they can become toxic
They are used finely so increase surface area
What the benefits and advantages of catalyst
It can increase rate of reaction without increasing the temperature so lesss energy cost and less co2
It can catalyse wide range of reactions so can be used multiply so increase atom exonomy and reduce waste
They can be specific so can produce specific product which can be used
How does heterogenous catalyst work
The gases are held in position by weak bonds in the active site adsorption and then react they are then released desorption
