MIDTERMS | Chemical Reactions: Rates and Energy Changes

Question 1

It is a branch of Chemistry that deals with reaction rates and the factors that influence the rates.

Answer 1

Chemical Kinetics

Question 2

The _________ _______ developed by Max Trautz and William Lewis provides practical explanations on why and how these factors affect the rate of a chemical reaction.

Answer 2

Collision Theory

Question 3

This is the minimum amount of energy needed to initiate a reaction.

Answer 3

Activation Energy

Question 4

A _________ _______ will proceed to form products if collisions among reactant particles are successful or effective.

Answer 4

Chemical Reaction

Question 5

___________ refers to the amount of substance per unit volume.

Answer 5

Concentration

Question 6

Changes in the _________ affect the average kinetic energy of particles.

Answer 6

Temperature

Question 7

If the temperature of reactants is increased, the kinetic energy that it possesses also _________

Choices:
A. Decreases
B. Increases

Answer 7

Increases

Question 8

__________ refers to the sum of the exposed regions of a solid substance.

Answer 8

Surface Area

Question 9

Increasing the particle size means _______ the total surface area.

Choices:
A. Decreasing
B. Increasing

Answer 9

decreasing

Question 10

A ________ is a substance added to a chemical reaction to increase the rate of a reaction.

Answer 10

Catalyst