Chemical Kinetics Flashcards
What is the collision theory of chemical kinetics?
the rate of a reaction is proportional to the number of collisions per second between the reacting molecules
What is activation energy?
the minimum energy of collision required for a reaction to take place
What is the Arrhenius Equation?
k = Ae^-(Ea/R*T)
What is the relationship between the frequency factor and the rate constant?
a direct, linear relationship
What is the relationship between the temperature and the rate constant?
as the temperature increases, the rate constant also increases
What is the energy of the transition state relative to the reactants and products?
its greater than both of them
What is the free energy change of the reaction?
the difference in the free energy of the products and reactants
What is an exergonic reaction (in regards to free energy)?
a reaction that has a negative free energy change and gives off energy
What is an endergonic reaction (in regards to free energy)?
a reaction that has a positive free energy change and absorbs energy
What are catalysts?
substances that increase reaction rates without themselves being consumed in the reaction
What is the Rate Law?
rate = k[A]^x[B]^y
What is zero order reaction?
which the rate of formation of product C is independent of changes in concentrations of any of the reactants, A and B;
rate = k[A]^0[B]^0
What is first order reaction?
rate that is directly proportional to only one reactant
rate = k[A]^1
What is a second order reaction?
rate is proportional to either the concentrations of two reactants or to the square of the concentration of a single reactant
rate = k[A]^1[B]^1
