Q: when it increases, reaction rate increases
A: temperature

Q: a reaction which occurs on its own
A: spontaneous

Q: this direction of reaction is favored if the amount of products increases with time
A: forward

Q: the denominator of rate
A: time

Q: this type of graph shows the rate to be variable
A: curved

Q: brackets symbolize this property
A: concentration

Q: as the concentration of a reactant increases, the reaction rate ________.
A: increases

Q: catalyst
A: these substances increase reaction rate

Q: the energy required for a reaction to begin
A: activation

Q: the concentration units use in the rate equation
A: molarity

Q: Arrenhius Equation
A: this equation related temperature to reaction rate

Q: the nature of molecular motion
A: random

Q: the feature of a concentration vs time graph which determines the rate
A: slope

Q: the sign of the activation energy term
A: positive

Q: as the activation energy increases, the reaction rate ______.
A: decreases

Q: reaction order
A: the power of the concentraton term in the rate equation

Q: surface area
A: this factor effects reaction rate

Q: the mathematical relationship between concentration of reactants and rate
A: direct

Q: the number of half lifes that result in 25% of the reactant remaining
A: three

Q: his equation related reaction rate to temperature
A: Arrenhius

Q: when the rate of the forward reaction and the reverse reaction are equal
A: equilibrium

Q: it is required for molecules before they can react
A: collision

Q: the temperature scale used in the Arrenhius equation
A: kelvin

Q: a substance which is formed and consumed during a reaction
A: intermediate

Q: exothermic
A: reactions which release energy

Q: half life
A: the time required for half the original amount of a reactant to be consumed

Q: the type of relationship existing between reactant concentration and reaction rate
A: direct

Q: reactants
A: the starting substances for a reaction

Q: the energy unit used in the Arrenhius equation
A: joule

Q: a "picture" of the progress of a chemical reaction
A: graph

Q: activation energy
A: the energy needed to get a reaction started

Q: moles
A: a common unit for measuring amounts in chemistry

Q: the order of reaction in which the starting quantity is unrelated to the half life of the reaction
A: first

Q: if these are weak for the reactants the reaction rate is rapid
A: bonds

Q: endothermic
A: reactions which absorb energy

Q: rate determing step
A: the slowest step in a reaction

Q: an equation which relates rate and concentration
A: rate equation

Q: a mechanism step involving two molecules
A: bimolecular

Q: rate
A: change in amount divided by change in time

Q: the word which means divide
A: per

Q: as it increases for the reactants, the reaction rate increases
A: concentration

Q: a common term for rate
A: speed

Q: specific rate constant
A: the constant used in the rate equation

Q: the rate of reaction when the graph of amount ve time is horizontal
A: zero