Module 4 - Chemical Kinetics Flashcards
Area of chemistry concerned with the speeds or rates at which a chemical reaction occurs.
Chemical kinetics
Suggests movements of change.
Kinetic
Change in the concentration of a reactant or a product with time (m/s).
Reaction rate
Factors affecting the Rate of Reactions
- Phase
- Temperature
- Surface area
- Concentration or pressure
Expresses the relationship of the rate of a reaction to the rate constant and the concentrations of the reactants raised to some powers.
The Rate Law
Rate depends on the reactant concentration raise to the first power.
First-order Reaction
He discovered radioactivity (February, 1869) by using natural fluorescent minerals to study the properties of x-rays.
Henri Becquerel
Who coined the term “radioactivity?”
Marie Curie
Time required for the concentration of a reactant to decrease half of its initial concentration.
Reaction Half-life
Rate of reaction is directly proportional to the no. of molecule collisions per second, or to the frequency of molecular collisions.
Collisions
Acceleration of a chemical reaction by a material unchanged chemically at the end of the reaction.
Catalysis
Substance that increases the rate of a reaction by lowering the activation energy.
Catalyst
Euler’s constant
e = ~ 2.718
Gas constant
R = 8.314 J/mol * k
Describes the relation between the rate of reaction and temperature for many physical and chemical reactions.
Arrhenius Equation
