Chemistry chapter 20( rate of reaction)

What is rate of reaction

is the speed at which the amount of reactants decreases or the amount of products increase. It is measured as a change in the concentration (or amunt) of reactants or products per unit time. (per second, per minute etc.

two reason for rate at any particualr point

1. Amount of energy the particles have
   2. Frequency of collisions

For factor affect the reastion

1. temperature,

2. concentration or pressure

3. SUrface area

4. Catalyst

How those 4 factor effect

Increasing either Amount of energy the particles have or frequency of collision can increases the rate of reaction by increasing successful collisions.

How temperature can effect

As the temperature increases particles gain more energy. Which mean they will move faster. If they move faster they will collide more frequently. Collide with more enrgy. More likey to exceed activation energy.

Concentration/ pressure

How many particles per unit of volome

How C/P work

As they increases more particles per unit of volume , they will collisions more frequent, which can increases the rate of reaction.

Surface Area

Higher surface area= increase rate of reaction

Present od the Catalyst

Catalyst are the substances that speed uo a reaction without being used up in the reaction themselves. so we don;t include them in the reaction equation)

Collision Theory

For a particles to react, they have to collide with each orther with sufficient energy. (Activation energy)