jewelle's mom
Name the four factors that affect reaction rate
Surface Area
Concentration
Catalyst
Temperature
What is the reaction rate formula?
rate=∆[A]/∆t
Which step is the rate determining step?
the slow one (jewelle)
True or false: In an endothermic reaction, reactants have more energy than products
False
Generally, reaction rate doubles for every ___ degree increase
10
What are the only two factors that affect the value ‘K’?
Temperature and the nature of the reaction
What is the difference between instantaneous rate of change and average rate of change?
Instantaneous is at a certain point and average rate of change is over an interval.
Where does a catalyst start in a mechanism and where does it end?
Starts as a reactant and ends as a product
The activation energy refers to the difference in energy from the peak of the graph to _____
the energy at which reactants start
What is the overall order of the following reaction?k[OH] [Br2]2
Third-order
Which reaction order (zero, first, or second) does not appear as concentration in the Rate law?
Zero order
When do you take the measurement in the initial rate method?
We want to take measurements as soon as the reactants are mixed.
How do you identify an intermediate?
It cancels out in the reaction mechanism
Calculate the activation energy of the reverse reaction of a reaction when the activation energy is 132 kJ/mol and the overall energy change is -226 kJ/mol
358 kJ/mol
What is the molecularity of the following reaction?
N2O2(g) + O2(g) → 2NO2(g)
Which graph represents first order reactions?
Time vs. ln(concentration)
What are the units for order 3?
(L2)(mol-2)(s-1)
Which graph has the slope “k” and not “-k”?
Second order (time v. 1/concentration)
With a zero order reaction, how does half life change?
it decreases
Identify the catalyst intermediate in the following reaction.
Step I: S2O8 2- + 2Fe2+ → 2SO42- + 2Fe3+
Step II: 2Fe3+ + 2I- → 2Fe2+ + I2
Overall Reaction: S2O8 2- + 2I-→2SO4 2- + I2
Catalyst: Fe2+
Intermediate: Fe3+
What is Jewelle’s mom’s occupation?
Police detective
Software engineer
Accountant
Small business owner
software engineer
What is the formula for half life?
t1/2 = 0.693/k
The area of chemistry that concerns reaction rates and reaction mechanisms
Kinetics
The collision model states that collisions must have sufficient energy to produce the reaction. What is the other requirement that is needed for a reaction to occur according to the collision theory?
Colliding particles must be correctly oriented
For a chemical reaction A→B, it is found that the rate of reaction doubles when the concentration of A is increased four times. The order of the reaction is...
2