3.1.5 - Kinetics Flashcards
Labels for Maxwell-boltzman distribution from left to right
Most probable energy
Mean energy
Activation energy
Effect of temperature on distribution
To the right and lower
How does increasing the temperature increase the rate of reaction
A greater proportion of molecules have energy greater than or equal to the activation energy so more frequent successful collisions
How does the distribution change with increased concentration and pressure
Whole distribution shifts to the right
How does the distribution change with the addition of a catalyst
The activation energy shifts to the left
How does a catalyst increase the rate of reaction
The activation energy is lowered meaning more particles have energy greater than or equal to the activation energy
Why does the distribution start at 0
No mortices have 0 mean energy
Heterogeneous catalyst
Different phase to the reactants
How does a heterogeneous catalyst work
The gases adsorb onto the active site of the catalyst, reaction takes place and the bonds are weakened, then the products are desorbed from the active site surface of the catalyst
Homogeneous catalyst
Same phase as the reactants
