Kinetics Flashcards
What is kinetics
Study of factors that affect the rate of reaction
What theory explains reactions
Collision theory
Name for energy required to cause reaction
Activation energy
What factors affect rate of reaction
Temperature
Concentration of solution
Pressure of gas
Surface area of solids
Catalysts
Why does increasing temperature affect rate
Causes particles to increase in energy
Why does concentration affect rate
More reactants in the same volume increases collisions
Why does gas pressure affect rate
Same number of reactants
Smaller volume
Greater number of collisions
Why does surface area affect rate
Reactants are more likely to collide if area to collide is greater
Why does a catalyst affect rate
As it brings particles together and reduces activation energy
What is activation energy
The minimum energy required for a reaction to occur
What do no particles have
No energy
Maxwell-Boltzmann distribution is used to show the what
Distribution of energy in particles
What do most particles have
Intermediate energies
What part of the curve demonstrates intermediate energies
Near the top of the curve
What do a few particles have
Very high energies
What do particles not have
They don’t have a limit on how much energy
What is the most probable energy
The energy where the mode of particles are
What is the average energy
The line where the area on the LHS=RHS
How does temperature affect rate of reaction on a maxwells-Boltzmann graph
The peak of the lowered and moves to the right. The area beyond the activation energy line increases as well.
How does temperature affect the area beyond the activation energy line.
Area beyond the line increases as more particles have a greater energy
How do catalysts affect reactions
They provide a different pathway for reactions.
How do different pathways for a reaction affect activation energy
They reduce the activation energy increasing rate of reaction.
What happens to activation energy when catalyst is used
Activation energies shift to the left so more particles have activation energy
What is a homogenous catalysts
The reactants and catalysts are in the same phase
What is a Heterogenous catalyst
The reactants and catalysts are in different phase
