MATH
Activation Energy
Catalysts
Rate Laws
100
A first order reaction is 75% complete at 320s. What are the first and second half lives for this reaction?
What is 160s
100
Energy that must be overcome for a chemical reaction to occur.
What is activation energy?
100
A substance that speeds up a reaction by lowering the activation energy.
What is a catalyst?
100
An expression that shows how the rate depends on the concentrations of reactants.
What is the Rate Law?
200

Find the new rate constant at 310K if the rate constant is 7 M-1s-1 at 370K, and the Activation Energy is 900kJ/mol.

(Hint: Use the Arrhenius equation)

1.788X10-24 M-1s-1

200

The time it takes to reduce the concentration of a reactant to half of its original value.

What is half-life?
200
A protein that acts as a catalyst in a biochemical reaction.
What is an enzyme?
200
The sum of the exponents in the reaction rate equation.
What is the overall reaction order?
300
Using the chart given to you on the sheet; What is the rate law and the value of the rate constant?

Rate = k[Cr(H2O)6 3+] [SCN]2 

k = 2.00x10-5

300

The main factors of Collision Theory

What are:

-Activation Energy

-Temperature

-Molecular Orientation

300
A Catalyst that involves gaseous reactants being adsorbed on the surface of a solid catalyst.
What is a heterogeneous catalyst?
300
Why do rate laws only involve the concentration of reactants?
Under conditions where we only consider the forward reaction.
400

A certain reaction has an activation energy of 54.0 kJ/mol. As the temperature is increased from to a higher temperature, the rate constant increases by a factor of 7.00. Calculate the higher temperature

325K
400

A substance that is formed in one step and used up in a subsequent step.

What is an intermediate?

400

Looking at the graph on the sheet of paper in front of you; name what the graph or curve is representing.

Maxwell-Boltzmann curve

400
What is the difference between a differential and integrated rate law?
Differential- shows how the rate of a reaction depends on concentrations.

Integrated- shows how the concentrations of species in a reaction depend on time.

500

Write the rate law expected for the mechanism given to you on the sheet of paper. What is the overall balanced equation for the reaction? What are the intermediates in the proposed mechanism?

Rate = k[C4H9Br]

Balanced equation:

C4H9Br + 2H2O → C4H9OH + Br- + H3O+

Intermediates: C4H9+ and C4H9OH2+

500

On the graph given to you, label the activation energy (reverse and forward), intermediate, and activated complex(s) on the graph given to you.

500
Describe the process of a heterogeneous catalyst.

1.Adsorption and activation of the reactants.

2.Migration of the adsorbed reactants on the surface.

3.Reaction of the adsorbed substances.

4.Escape, or desorption, of the products

500
List all the integrated rate laws and their orders.

0th: [A]=-kt + [A]

1st: ln[A]=-kt + ln[A]

2nd: 1/[A] = kt + 1/[A]

M
e
n
u