chemical kinetics Flashcards
rate law?
an expression in which rate of the reaction is expressed in terms of molar concentration raised to some power which can or cannot not be equal o is stoichiometric coefficients
rate constant?
is the Rate of reaction for which the molar concentration is in unity
Elementary Reaction
The reaction that occurs in a single step to give the product is called an elementary reactions.
Complex reaction:
The reactions that occur as a result of sequence of elementary reactions to give the product is called complex reactions.
rate of reaction depends on
Temperature.Pressure,
Catalyst,Nature of reactant
Surface area
The average rate
The average rate of the reaction is the ratio of change in concentration of reactants to the change in time.
instantaneous rate of the reaction
The ratio of change in concentration in chemical reaction to the time period is termed as instantaneous rate of the reaction.
order of reaction.
The addition of power of the concentration of reactant in a rate law expression gives the order of reaction.
pseudo 1s order reaction
a reaction of higher order but behaves like a firs order reac is called pseudo 1s order reaction
molecularity of a reaction
the number of molecules participating in an elementary chemical reaction that collides to bring about the chemical reaction is called molecularity of a reaction.
half-life reaction
The time elapsed in reduction of the concentration of a reactant participating in a chemical reaction to one half of its original concentration is called half-life reaction and is represented by t1/2
activation energy
The minimum quantity of external energy required for the conversion of reactant into product or to produce an unstable intermediate is called activation energy
unit of first order reaction
s^-1
unit of zero order reaction
mol lit^-1s^-1
unit of 2 order reaction
mol^-1lit s^-1
