Chemical Kinetics Review

Question 1

Chemical kinetics is the study of ________.

Answer 1

The rates or speeds at which chemical reactions occur.

Rogers, Chem for Eng, Pg. 397

Question 2

How can the rate of a chemical reaction be described?

Answer 2

The change in the concentration of a reactant or product divided by a unit of time.

Rogers, Chem for Eng, Pg. 397

Question 3

What are the two typical units for describing a given reaction rate?

Answer 3

M/s or mol/(L*s)

Rogers, Chem for Eng, Pg. 398

Question 4

In general, the higher the temperature, the ____ the chemical reaction.

Answer 4

faster

Rogers, Chem for Eng, Pg. 402

Question 5

Ions dissolved in an aqueous solution tend to react ______, while covalently bonded molecules tend to react more ________.

Answer 5

very fast
slowly

Rogers, Chem for Eng, Pg. 402

Question 6

Compounds with strong covalent bonds generally react more _____ than compounds with weak bonds.

Answer 6

slowly

Rogers, Chem for Eng, Pg. 402

Question 7

Larger molecules often react more _____ than smaller ones.

Answer 7

slowly

Rogers, Chem for Eng, Pg. 402

Question 8

The rate of a homogeneous reaction, in which all of the substances are in the same phase, usually depends on________.

Answer 8

Reactant concentrations

Rogers, Chem for Eng, Pg. 402

Question 9

A reaction can only occur when molecules _______.

Answer 9

Collide.

Rogers, Chem for Eng, Pg. 402

Question 10

What does a condensed phase refer to?

Answer 10

A solid or liquid phase as opposed to a gaseous phase.

Rogers, Chem for Eng, Pg. 402

Question 11

The rate of a heterogeneous reaction can be greatly influenced by the _______________.

Answer 11

State of subdivision of the condensed phase (such as a lump of coal versus coal dust).

Rogers, Chem for Eng, Pg. 402

Question 12

Reactions between a gas and a solid or between a liquid and a solid occur at _________.

Answer 12

The surface of the solid.

Rogers, Chem for Eng, Pg. 402

Question 13

For reactions between a gas and a solid or between a liquid and a solid, a greater surface area generates a _________.

Answer 13

Faster reaction and therefore higher reaction rate.

Rogers, Chem for Eng, Pg. 402

Question 14

True or False

The rates of a given reaction can be influenced by the presence of a catalyst.

Answer 14

True

Rogers, Chem for Eng, Pg. 402

Question 15

A catalyst ______ a reaction without being _____ by the reaction.

Answer 15

Speeds up
consumed

Rogers, Chem for Eng, Pg. 402