Chem 104 Kinetics exam with 100% correct
answers
4 factors that contribute to/change reaction rate -
answer 1) concentration
2)reactant phase
3)temperature
4)catalyst
if their is a plot of concentration over time of the
reaction A--> 2B+C.Describe what the graph would
look like. - answer A's slope would be exponentially
negative since it is a reactant. Both B and C's slope
would be exponentially positive since they are both
products but Bs slope/line would be 2x C's due to
coefficients.
Steps To determine the initial rate from a graph -
answer 1) Find a point on line and then another
point close to it
2)find slop of those two points
how do you find instantaneous rate? - answer take
the slope of the line tangent to the point
, how do you find average rate? - answer take the
slop of the two points (the certain start point and
the certain end point that are given to you)
Steps to writing a rate expression - answer 1) write
delta molecule/delta Time
2) add - sign for reactants and + sign for products
3)use coefficients to form ratios
4) set all expressions equal to each other
Writing a rate law - answer rate=k[A]^x[B]^y
where:
rate is the initial rate of reaction
k is the constant (slope of linear line)
A and B are reactants
x and y are the order of each reactant (0,1,2 or 3)
order of reactants - answer zero order (no
relationship to initial rate)[A]^0
1st order (direct relationship to initial rate)[A]^1
2nd order [A]^2
Steps to determine order of reaction - answer 1)
compare reactant A to initial rate when reactant B
is the same/constant
answers
4 factors that contribute to/change reaction rate -
answer 1) concentration
2)reactant phase
3)temperature
4)catalyst
if their is a plot of concentration over time of the
reaction A--> 2B+C.Describe what the graph would
look like. - answer A's slope would be exponentially
negative since it is a reactant. Both B and C's slope
would be exponentially positive since they are both
products but Bs slope/line would be 2x C's due to
coefficients.
Steps To determine the initial rate from a graph -
answer 1) Find a point on line and then another
point close to it
2)find slop of those two points
how do you find instantaneous rate? - answer take
the slope of the line tangent to the point
, how do you find average rate? - answer take the
slop of the two points (the certain start point and
the certain end point that are given to you)
Steps to writing a rate expression - answer 1) write
delta molecule/delta Time
2) add - sign for reactants and + sign for products
3)use coefficients to form ratios
4) set all expressions equal to each other
Writing a rate law - answer rate=k[A]^x[B]^y
where:
rate is the initial rate of reaction
k is the constant (slope of linear line)
A and B are reactants
x and y are the order of each reactant (0,1,2 or 3)
order of reactants - answer zero order (no
relationship to initial rate)[A]^0
1st order (direct relationship to initial rate)[A]^1
2nd order [A]^2
Steps to determine order of reaction - answer 1)
compare reactant A to initial rate when reactant B
is the same/constant
