unit 1 section 5 kinetics Flashcards
what is the rate of reaction
it is the change in the amount of reactants or products over time
what is the collision theory
it is the theory that two particle will not react unless they collide in the right direction and they collide with at least the minimum amount of kinetic energy ( activation energy) .
what is activation energy
it is the minimum amount of energy particles need to react
why does the curve on the maxwell boltzmann curve start at 0
this is because no particle can have no energy
what is the line at the middle of the maxwell curve
it is the most likely energy any single particle will have
what is the line that is slightly to the right of the line in the middle of the curve
it is the mean/average energy of all the particles/molecules
what is the line with Ea next to it
it is the activation energy
what effect does increasing the temperature have on the rate of reaction
when you increase the temperature, the particles on average will have higher kinetic energy and will move faster. this means that reaction will occur more frequently as the particles are moving faster. also, the there will be more particles with the require activation energy therefore more particles will be able to react.
what effect does increasing temperature have on the maxwell boltzmann curve
increasing the temperature will push the curve to the right and the area under the curve will stay the same. the activation energy also stays the same.
what affect does increasing the concentration have on the rate of reaction
increasing the concentration increases the rate of reaction as there are more particles in a given space so collision will occur more frequently and more particles may have the required activation energy.
what affect does increasing the concentration have on the maxwells boltzmann curve
the height of the curve increases as there are more particles, the mean energy, most likely energy and the activation energy does not change.
what is a catalyst
it is a substance that increases the rate of reaction without being used up in a reaction ( it is chemically unchanged)
how does a catalyst increase the rate of reaction
it increases the rate of reaction by providing an alternative pathway with a lower activation energy.
how does the presence of a catalyst affect the maxwells boltzmann curve
it only reduces the Ea ( activation energy ). the curve does not change
what is the equation for the rate of reaction
rate of reaction = amount of product formed or reactant used / time
