Chem 112- final exam questions and
answers solution guaranteed
quickly - correct answers gases react more [slowly/quickly] than liquids
concentration, temperature, catalyst, diffusion rate - correct answers factors affecting reaction rates
reaction rate - correct answers the speed of a chemical reaction in molarity/second
change in concentration of B/change in time - correct answers average rate of appearance of B
instantaneous rate - correct answers the rate of reaction at a particular moment
initial rate - correct answers rate at time = 0
rate law - correct answers an equation that shows how the rate depends on the concentrations of
reactants
K[A]^m x [B]^n - correct answers general form of a rate law
rate constant - correct answers the units of this can be found by dividing M/s by the units of
concentration
zero - correct answers if a reaction is unchanged by concentration, it is this order
first - correct answers if the rate change is proportional to concentration change, the reaction is this
order
,second or greater - correct answers if rate change is exponential, the reaction is this order
does - correct answers the rate of a reaction [does/does not] depend on concentration
does not - correct answers the rate constant [does/does not] depend on concentration
first-order reaction - correct answers a reaction whose rate depends on the concentration of a single
reactant raised to the first power
ln[A] sub t = -Kt + ln[A] initial - correct answers the integrated rate law
straight, -K, ln[A] initial - correct answers first-order reaction graphs of ln[A] sub t versus time gives a
[straight/curved] line with this slope and this y-intercept
second order reaction - correct answers a reaction whose rate depends on the reactant concentration
raised to the second power or on the concentrations of two different reactions, each raised to the first
power
straight, K, t/[A] initial - correct answers second-order reaction graphs of 1/[A] sub t gives a
[straight/curved] line with this slope and this y-intercept
first - correct answers the graph of the natural log of this-order reaction versus time is linear
second - correct answers the graph of 1/[A] of this-order reaction versus time is linear
half-life - correct answers the time it takes for the concentration of a reactant to reach one-half of its
initial value
first - correct answers for this order rate law, half life does not depend on concentration
.693/K - correct answers equation for the calculation of a substance's half-life
, 1/K[A] initial - correct answers equation for the calculation of half life of upper-order reactions
the collision model - correct answers this model says molecules must collide to react
greater - correct answers the greater the number of reactions per second, the [greater/smaller] the
reaction rate
activation energy - correct answers the difference in energy between that of the starting molecule and
the highest energy along the reaction pathway
activated complex/transition state - correct answers the arrangement of atoms at the top of the barrier
faster - correct answers the lower the activation energy, the [slower/faster] the reaction
the frequency factor - correct answers this is related to the frequency of collisions and the probability
that they are favorably oriented for a reaction
reaction mechanism - correct answers the process by which a reaction occurs
elementary reaction - correct answers a reaction that occurs in a single step
molecularity - correct answers the number of molecules that participate in a reaction
unimolecular - correct answers describes a reaction in which only one molecule is involved
multistep mechanism - correct answers a reaction that consists of a sequence of elementary reactions
intermediate - correct answers a substance in a reaction that is neither reactant nor product
answers solution guaranteed
quickly - correct answers gases react more [slowly/quickly] than liquids
concentration, temperature, catalyst, diffusion rate - correct answers factors affecting reaction rates
reaction rate - correct answers the speed of a chemical reaction in molarity/second
change in concentration of B/change in time - correct answers average rate of appearance of B
instantaneous rate - correct answers the rate of reaction at a particular moment
initial rate - correct answers rate at time = 0
rate law - correct answers an equation that shows how the rate depends on the concentrations of
reactants
K[A]^m x [B]^n - correct answers general form of a rate law
rate constant - correct answers the units of this can be found by dividing M/s by the units of
concentration
zero - correct answers if a reaction is unchanged by concentration, it is this order
first - correct answers if the rate change is proportional to concentration change, the reaction is this
order
,second or greater - correct answers if rate change is exponential, the reaction is this order
does - correct answers the rate of a reaction [does/does not] depend on concentration
does not - correct answers the rate constant [does/does not] depend on concentration
first-order reaction - correct answers a reaction whose rate depends on the concentration of a single
reactant raised to the first power
ln[A] sub t = -Kt + ln[A] initial - correct answers the integrated rate law
straight, -K, ln[A] initial - correct answers first-order reaction graphs of ln[A] sub t versus time gives a
[straight/curved] line with this slope and this y-intercept
second order reaction - correct answers a reaction whose rate depends on the reactant concentration
raised to the second power or on the concentrations of two different reactions, each raised to the first
power
straight, K, t/[A] initial - correct answers second-order reaction graphs of 1/[A] sub t gives a
[straight/curved] line with this slope and this y-intercept
first - correct answers the graph of the natural log of this-order reaction versus time is linear
second - correct answers the graph of 1/[A] of this-order reaction versus time is linear
half-life - correct answers the time it takes for the concentration of a reactant to reach one-half of its
initial value
first - correct answers for this order rate law, half life does not depend on concentration
.693/K - correct answers equation for the calculation of a substance's half-life
, 1/K[A] initial - correct answers equation for the calculation of half life of upper-order reactions
the collision model - correct answers this model says molecules must collide to react
greater - correct answers the greater the number of reactions per second, the [greater/smaller] the
reaction rate
activation energy - correct answers the difference in energy between that of the starting molecule and
the highest energy along the reaction pathway
activated complex/transition state - correct answers the arrangement of atoms at the top of the barrier
faster - correct answers the lower the activation energy, the [slower/faster] the reaction
the frequency factor - correct answers this is related to the frequency of collisions and the probability
that they are favorably oriented for a reaction
reaction mechanism - correct answers the process by which a reaction occurs
elementary reaction - correct answers a reaction that occurs in a single step
molecularity - correct answers the number of molecules that participate in a reaction
unimolecular - correct answers describes a reaction in which only one molecule is involved
multistep mechanism - correct answers a reaction that consists of a sequence of elementary reactions
intermediate - correct answers a substance in a reaction that is neither reactant nor product
