kinetics
the study of rates of reactions and how they are influenced by certain factors like concentration, temp, cataly
surface area
increase of temp
causes increase in reaction rate, since the higher temp provides a higher kinetic energy for the reacting parti
catalyst
a substance that increases the rate of a reaction without being consumed int he overall reaction (lowers activ
energy)
increase in surface area
causes solid reactant rate to increase due to the increased surface area of the particles of solid reactants (by
solid into a fine powder) since solids can only react at their surfaces.
increase in concentration
causes reaction rate to increase since this provides more of the reacting particles to undergo the next reactio
occasionally the rxn rate is unaffected (but that is very rare)
, rate determining step
rate of a reaction is always determined by the slowest step, if slowest step isn't a reactant for example then c
concentration of rxn wont change the overall reaction rate
reaction rate
the increase in molar concentration of product per unit of time or the decrease in molar concentration of reac
of time usually expressed in moles per liter per second (mol/L*s)
∆t
change in time (defined as tf-ti)
∆[ ]
change in molar concentration (which is defined as conc f - conc i)
instantaneous rates...
decrease as rxn proceeds since the concentration of reactants becomes smaller due to consumption of reac
rate finally becomes 0 as reaction stops
the study of rates of reactions and how they are influenced by certain factors like concentration, temp, cataly
surface area
increase of temp
causes increase in reaction rate, since the higher temp provides a higher kinetic energy for the reacting parti
catalyst
a substance that increases the rate of a reaction without being consumed int he overall reaction (lowers activ
energy)
increase in surface area
causes solid reactant rate to increase due to the increased surface area of the particles of solid reactants (by
solid into a fine powder) since solids can only react at their surfaces.
increase in concentration
causes reaction rate to increase since this provides more of the reacting particles to undergo the next reactio
occasionally the rxn rate is unaffected (but that is very rare)
, rate determining step
rate of a reaction is always determined by the slowest step, if slowest step isn't a reactant for example then c
concentration of rxn wont change the overall reaction rate
reaction rate
the increase in molar concentration of product per unit of time or the decrease in molar concentration of reac
of time usually expressed in moles per liter per second (mol/L*s)
∆t
change in time (defined as tf-ti)
∆[ ]
change in molar concentration (which is defined as conc f - conc i)
instantaneous rates...
decrease as rxn proceeds since the concentration of reactants becomes smaller due to consumption of reac
rate finally becomes 0 as reaction stops
