Chapter 16 - Kinetics: Rates and Mechanisms of Chemical Reactions

Collision frequency

, and therefore reaction rate, are also affected by the physical condition of the reactants, which influences how easily they mix.

O3

Most collisions between NO and molecules in the reaction vessel contain only enough energy for the molecules to bounce off one other without reacting.

Collision frequency

, and therefore reaction rate, are also affected by the physical condition of the reactants, which influences how easily they mix.

O3

Most collisions between NO and molecules in the reaction vessel contain only enough energy for the molecules to bounce off one other without reacting.

Reactants

are transformed into products in a chemical reaction by definition.

reaction rate

Temperature influences by increasing collision frequency and, more crucially, collision energy: The frequency with which collisions occur.

Physical state

influences rate by determining how well reactants can mix.

Humans age

over decades, and coal is formed from dead plants over hundreds of millions of years.

Concentration

influences rate by influencing the frequency and, more importantly, the energy of collisions between reactant molecules.

response rate

Knowing the is important because how quickly a drug acts may mean the difference between life and death, and how long it takes a commercial product to develop can be the difference between profit and loss.

temperature

refers to enough energy that must be present for molecules to collide.

Chemical kinetics

, the study of how quickly change happens, focuses on the reaction rate, or the change in reactant (or product) concentrations as a function of time.

term Concentration

The refers to molecules that must collide in order to react.

Physical state

: In order for molecules to collide, they must first mix.