Molecularities, Reaction Mechanisms and Arrhenius Equations

Question 1

Reaction Mechanism Def.

Answer 1

Sequence of elementary steps that lead to product production. Doesn’t tell how reaction takes place

Question 2

Elementary Reaction Def

Answer 2

Each individual step in a reaction. Shows intermediates

Question 3

Molecularity Def

Answer 3

Number of moles reacting at each elementary Step

Question 4

Rate Determining Step Def

Answer 4

The slowest elementary step. Can only be deduced experimentally. Determines reaction order

Question 5

Unimolecular Def

Answer 5

Elementary step had 1 reactamnt

Question 6

Bimolecular

Answer 6

Elementary step had 2 reactants

Question 7

Tetramolecular Def

Answer 7

Elememtary step had 3 reactant

Question 8

How is Order Determined for Single step reactions

Answer 8

Stochiometry

Question 9

Unimolar Reactions rate Laws eg A -> P

Answer 9

rate = k[A]

Question 10

Bimolar Reaction Rate Laws eg A + B -> P or 2A -> P

Answer 10

rate = k[A][B] or rate = [A]^2

Question 11

tetrapolar reaction rate laws eg 2A + B -> P

Answer 11

rate = k [A]^2 [B]

Question 12

What do the number of humps on an energy profile diagram translate to

Answer 12

Number of steps in multistage reaction

Question 13

What does the size of the hump translate to on an energy profile diagram

Answer 13

bigger hump = bigger activation energy = slower process

Question 14

Arrhenius Equation (original)

Answer 14

rate constant = (collision frequency factor) x e^(-(activation energy)/((gas constant)(temp)))

Question 15

Arrhenius Equation (y = mx + c)

Answer 15

ln(k) = ln(frequency factor) x (-(activation energy)/((R)(temp)))

Question 16

Activation Energy Def

Answer 16

Minimum amount of energy required for chemical reaction to occur