University:
Eastern Kentucky University
Course:
CHE 111 | General Chemistry
Academic year:

2022
Views:

413

Pages:

2
Author:

Prince Sampson

Unit 5: Kinetics Reaction rate: ● change in concentration of a reactant/product over time: Δ[A]/Δt Reactions are dependent upon: ● Temperature ○ As temp ↑, rate ↑ ● Concentration ○ as reactants’ concentration ↑, rate↑ ● Surface Area ○ As reactant surface area ↑, rate ↑ ● Catalyst ○ With a catalyst, rate ↑ ● Chemical nature of reactants Zero Order Reactions: First Order Reactions: Second Order Reactions: Effective Collisions: ● A chemical reaction can only occur if reactant molecules, atoms or ions collide with more than a certain amount of kinetic energy and in the proper orientation. ● When a system is heated up, the reactants will not only collide with more energy, but they will also collide more frequently. The increase in frequency increases the probability of having a collision in the proper orientation. Thus, increasing the rate of the reaction. Reaction Intermediate: ● substance that is produced and used in the reaction, but doesn’t appear in the net equation. A reaction intermediate could be a catalyst. Rate Determining Step: ● The rate determining step is the slowest step in a reaction mechanism and determines the rate or speed of the reaction.