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Definitions
Reactions
Collision Theory
Reaction law
100

What is reaction rate?

The speed of a chemical reaction

100
The heat of reaction is...
What is "the energy difference between the reactants and products"?
100
What happens if a collision has correct orientation but insufficient energy?
no reaction!!!
100
What is reaction order if we double concentration but reaction rate remains same?
0 order
200

What is Chemical Kinetics?

the area of chemistry concerned with the speed at which reactions occur

200

What is endothermic reactions?

when the energy of the products is less than the energy of the reactants

200
What is formed from a collision?
An activated complex.
200
SO2 + O3 ----> SO3 + O2 SO2 is 2 order O3 is 0 order What is the rate law for this reaction?
rate = k[SO2]2 . [O3]0
300

What is activation energy?

the energy needed to start a reaction.

300
Which line (blue/green) is the endothermic reaction?
The green line
300
What collision theory states?
That in order for molecules to react, they must collide
300

What is rate law?

it shows how the rate of a reaction depends on the concentration of the reactants

400

What is activated complex?

When two molecules have an effective collision, a temporary, high energy (unstable) chemical species is formed

400
what does the rate of reactions depend on?
The presence of catalysts, surface area, Concentration, Temperature
400
2 things that must happen for the collision theory to happen
Collisions must have the correct orientation, Collisions must have sufficient energy to break bonds
400

Why were 50 points taken from Gryffindor?

Harry, Ron, and Hermione were caught out of bed by Professor McGonagall

500

Define heterogeneous catalyst

they hold one reactant molecule in proper orientation for reaction to occur when the collision takes place

500

what does the graph show?

an exothermic reaction with and without a catalyst.

500
How do we call this equation? k = A(e^-Ea/RT)
arrhenius equation
500

In a reaction between hydrogen and nitrogen monoxide, doubling the concentration of hydrogen quadruples the rate, while doubling the concentration of nitrogen monoxide doubles the rate.

Write the rate law for this reaction.

k[H₂]²[NO]