Kinetics

Question 1

what is the rate of reaction

Answer 1

the time it takes for all the reactants to have been used up/all the products to have been formed

Question 2

forumla for ROR

Answer 2

change/time

Question 3

Factors that affect reaction rate

Answer 3

temperature
concentration
light
catalysts
pressure in gasesous reactants
surface area in solid reactants

Question 4

where is the ROR the fastest

Answer 4

at the beginning of the reaction due to the higher concentration of reactants

Question 5

what is the collision theory

Answer 5

According to the collision theory, reactions can only occur when:

1. Reactants collide in the correct orientation.
2. Reactants have the enough energy to form its products.

• activation and suficent kinetic energy is required

Question 6

what is activation energy

Answer 6

the minimum energy needed for a reaction to occur

Question 7

what is the maxwell boltzmann distribution

Answer 7

• range of energy/Users/mayrasalazar/Downloads/51c06e6ee4b0a49e8c8f47e6-aaronq-1371569791668-screen_shot_20120502_at_11212_pm1335978747666-2.png

Question 8

what is average kinetic energy proportional to

Answer 8

temperature

Question 9

what is a fruitful collision

Answer 9

a collision which results in a reaction,

more succesful collions= increase of rate in a reaction

Question 10

what does the increase of reactants do

Answer 10

increase the rate as there is a higher number of successful collisions

Question 11

How to make the ROR better in solids

Answer 11

• decrease particle size, as only surface molecules react

Question 12

how to make the ROR better in gaseous

Answer 12

increase concentration

ideal gas concentration

Question 13

what does increasing the temperature do

Answer 13

increases the kinetic energy, increases the rate of reaction, increases fruitful collisions
- shifts distribution graph

Question 14

what is a catalyst

Answer 14

a substance that increases the rate without reacting itself

Question 15

What Happens During a Reaction

Answer 15

A chemical reaction is essentially involves two processes, bond breaking and bond forming. As mentioned in the Energetics chapter, particles tend to react to become more stable.

Question 16

collision theory summary

Answer 16

Collision theory – reactions take place as a result of particles (atoms or molecules) colliding and then undergoing a reaction. Not all collisions cause reaction, however, even in a system where the reaction is spontaneous. The particles must have sufficient kinetic energy, and the correct orientation with respect to each other for the two to react. Even then, the transition state may revert to the reactant molecules instead of forming the product molecules.

Question 17

what is chemical kinetics

Answer 17

the study of the factors that affect the ROR