Reaction Rates
The factors that affect reactions rates.
What are physical state of the reactants, concentration of the reactants, temperature, and the presence of a catalyst?
The rate law of a first order process.
What is rate law = k[A]?
A discrete step in a reaction mechanism.
What is an elementary process/reaction?
The minimum energy required for a reaction to occur.
What is activation energy?
The change in concentration divided by the change in time in an interval.
What is rate of reaction?
Trial [A] [B] Rate
1 1.0 1.0 1.30x10-3
2 2.0 1.0 5.20x10-3
3 1.0 2.0 2.60x10-3
The order in respect to reactant A.
What is second order?
The stable species formed between transition states in a multistep reaction.
What is an intermediate?
This increases the rates of reaction by providing an alternative reaction pathway with lower activation energy.
What is an enzyme?
For the reaction:
2A +3B ---> 1C + 4D
If I have 4A's the rate of appearance of C is?
What is 2C's
Trial [A] [B] Rate
1 0.6 0.15 6.3x10-3
2 0.2 0.6 2.8x10-3
3 0.2 0.15 7.0x10-4
The rate law for this reaction
What is rate = [A]2[B]?
The conditions of the molecules of the reactants in order for collision to occur.
What is correct orientation and enough energy?
zero order integegrated rate law?
[At]=-kt + [Ao]
For the reaction:
2H2(g) + 2NO (g) → N2(g) + 2H2O (g)
The rate of disappearance of NO when the rate of appearance of N2 is 3.0x10-4 M/s.
What is (-)6.0x10-4 M/s?
*the negative is only needed when the question doesn't state "rate of disappearance"
C2H6 + O2 -> CO2 + H2O
What is the rate law if C2H6 stays the same, O2 doubles and the reaction rate doubles. When O2 stays the same C2H6 doubles and the reaction rate also stays the same?
What is Rate=k[C2H6]1[O2]0
2NO2(g) ---> NO (g) + NO3 (g) (slow)
NO3(g) + CO(g) ---> NO2(g) +CO2(g) (fast)
The rate law of the above reaction.
What is rate=k[NO2]2?
The integrated rate law for second order reactions.
What is 1/[A]t = 1/[A]0 + kt?
For the reaction:
4 Fe + 3 O2 ---> 2Fe2O3
The rate of appearance of Fe2O3 when the rate of disappearance of O2 is 5.0x10-6 M/s.
What is 2.5x10-6 M/s?
Trial [A] [B] Rate
1 0.04 0.04 9.6x10-6
2 0.08 0.04 1.92x10-5
3 0.08 0.02 9.6x10-6
The rate when [A] = 0.12 M and [B] = 0.015 M.
What is rate = 1.08 x 10-5 M/s ?
2NO <---> N2O2 (fast)
N2O2 + H2 ---> N2O + H2O (slow)
N2O + H2 ---> N2 + H2O (fast)
The rate law for this reaction.
What is rate = k[N2O2][H2]?
The original concentration when the half-life for a first-order reaction is 32.0 seconds. What is the concentration after 120 seconds? If your initial concentration is 1M?
What is 0.073M