CHEMICAL KINETICS Flashcards
area of chemistry concerned with the speed, or rate, at which a chemical reaction occurs
Chemical Kinetics
the change in concentration of a reactant or a product with time (M/s)
Reaction rate
reactant molecules are _____________ while product molecules are__________
consumed
formed
_________ in the number of A molecules and
_________ in the number of B molecules
decrease
increase
an expression relating the rate of a reaction to the rate constant and the concentrations of the reactants
Rate law
Determined experimentally
Rate law
a constant of proportionality between the
reaction rate and the concentrations of the reactants
Rate constant
The sum of the powers to which all reactant concentrations appearing in the rate law are raised
Overall rate order
a reaction whose rate depends on the reactant concentration raised to the first power
First-order reaction
a reaction whose rate depends on the concentration of one reactant raised to the second power or on the concentrations of two different reactants, each raised to the first power
Second-order reaction
a reaction whose rate is a constant and independent of reactant concentration.
Zero-order reaction
time required for the concentration of a reactant to decrease to half of its initial concentration
Half-life (t1⁄2)
rate constant
k
time (in s)
t
initial reactant concentration (in M)
[A]0
