energy bits in kinetics Flashcards
define activation energy
the minimum energy required to have a successful collison occur
what does particles colliding depend upon
the orientation of the particle
the energy of the collison
define rate of reaction
change in conc of reactants or products/time
what does increasing conc do to the rate reaction
more reactant particles increases the frequency of collisions per second
what does increasing the temp do tot he reaction
particles move faster therefore the frequency of collisons increases per sec
what does increasing the pressure do the reaction
decreases particle spacing therefore increases the frequency of collisions per second
define a catalyst
lowers activation energy by finding an alternate reactant pathway. does not get used up
what is Emp
the most probable value - draw at the peak
what are the axis of maxwell boltzman curvews
number of molecules- y
energy - x
what must particles in a chem reaction have
energy greater than the activation enrgy
what is a heterogenous catalyst
reactants and catalysts are in a different physical state
what is a homogenous catalyst
reactants and catalysts are in the same physical state
what are the stages for a catalysts work
- adsorption - gases will attach to the the surface - they adhere to it
- the reactant bonds break. the catalyst has to hold the reactant for the perfect time for it to react. the catalyst has a very weak sticking force.
- product bonds form
- diffusion - products will diffuse away
what is an inhibitor
poisoned catalysts
