Kinetics Flashcards
Define Rate of Reaction
The change in concentration of reactant consumed or product formed per unit time.
Define Rate Equation
A mathematical expression that relates the rate of reaction to the concentration of the reactants raised to the appropriate power.
Define Order of Reaction
The power to which the concentration of the reactant is raised in the rate equation.
Define Rate Constant (k)
The proportionality constant in the rate equation at a given temperature
What does rate constant change with?
Temperature and Activation Energy (Ea)
Define Half-Life
It is the time taken for the concentration of a reactant to fall to half its initial value.
What is the rate-determining step?
The slow step that controls the overall rate of the reaction.
What is Activation Energy?
The minimum energy molecules need to possess for a reaction to occur.
What is a Catalyst?
It increases the rate of a chemical reaction with itself being regenerated and chemically unchanged at the end of the reaction.
What are Enzymes?
Biological catalysts which may have specific activity.
How to write a Rate Equation?
Rate = k [A]ᵐ [B]ⁿ
Half life equation?
t1/2 = ln2 / k
for first order reactions only!
how to find the number of half lives elapsed?
[A]t / [A]0 = (0.5)ⁿ
