Reaction Rates & Chemical Equilibrium Flashcards
What is chemical kinetics?
The study of the rates of chemical reactions.
What is the rate of reaction?
The increase in concentration of iodomethane divided by the time interval.
What factors affect the rate of reaction
- Molecular collisions
- Activation energy
- Nature of the reactants
- Concentration of the reactants
- Temperature
- Presence of a catalyst
What is an effective collision?
A collision that results in a reaction.
What are the two main reasons why some collisions are effective and others are not?
Activation energy and the relative orientations of the colliding particles.
What is activation energy?
The minimum energy required for a reaction to take place.
When is a reaction exothermic?
When energy is released.
True or False: reactions between covalent compounds are slower.
True
True or False: for many reactions there is a direct relationship between concentration and reaction rate; when concentration doubles the rate doubles.
True
What is the approximate rule for temperate where reaction rate doubles?
When temperate increases by 10 degrees.
What is a catalyst?
A substance that increases the rate of a chemical reaction without itself being used up.
What is equilibrium?
A dynamic state in which the rate of the forward reaction is equal to the rate of the reverse reaction.
What is the equilibrium constant?
The product of the concentration of products of a chemical equilibrium divided by the concentration of reactants, each raised to the power equal to its coefficient in the balanced chemical equation.
WRITTEN CARD ABOUT EQUILIBRIUM CONSTANT EXPRESSION.
Proper card.
True or False: there is no relationship between a reaction rate and the value of the equilibrium constant (K).
True
