AP Chem Unit 5 Review

Kinetics

The study of the rates of a chemical reaction

Concentration, temperature, surface area, catalysts, volume

What factors affect reaction rate?

Ms⁻¹

Rate constant for 0th order

s⁻¹

Rate constant for 1st order

M⁻¹s⁻¹

Rate constant for 2nd order

M⁻²s⁻¹

Rate constant for 3rd order

Linear

Zero, first, and second order have ______ slopes on graphs

[A]

Y-axis for Zeroth order

ln [A]

Y-axis for First order

1/ [A]

Y-axis for Second order

Half-life

The amount of time it takes for a radioactive sample to decay to half its original amount

First order

Half-life is always _____ order

Exothermic

When reactants are higher than products it is a _____ reaction

Endothermic

When products are higher than reactants it is a ______ reaction

Exothermic

This is an _______ reaction

Endothermic

This is an _______ reaction

Decreases

As activation energy increases, reaction rate _______

-Molecules must collide

-Molecules must collide with sufficient energy

-Molecules must collide with correct orientation

Parts of the collision theory are ______ , ______ , _______

Speeds up a reaction

What does a catalyst do?

Beginning ; end

A catalyst is in the _____ then _____ of a reaction mechanism

End ; beginning

An intermediate is in the ______ then ______ of a reaction

SLOWEST

The rate of a reaction can never be faster than its ______ step

Highest

The slowest step has the _____ peak

Intermediates

What CANNOT show up in an overall reaction?

Reversible

When substituting use the ________ fast step

Speeds up

A catalyst ______ a reaction

Homogeneous Catalysis

A reaction in which catalysis is in the same phase as the catalyst

Heterogeneous Catalysis

A reaction in which catalysis is in a different phase as the catalyst