CH7 Flashcards
Definition of rate of reaction
Change in quantity of product or reactant per unit time
Definition of average rate of reaction
Average value of rate of reaction that occur in a particular time period
Definition of instantaneous rate of reaction
rate of reaction of a particular point of time
Definition of Catalyst
Chemical substance that alter rate of reaction with any chemical change at the end of reaction
Collision theory
For A collision to occur, particles must collide with one another to break bonds & form bonds
2 Rules of effective collisions
Reactant particles have energy equal to or higher than activation energy
reactant particles collide in the correct orientation
Definition of Activation energy
Energy barrier that needed to be overcome for a reaction to take place
Effect of increasing Concentration of reactant particles/pressure of gas
Number of reactant particles per unit volume increases
Frequency of collision between reactant particles increase
Frequency of effective collision between reactant particles increase
rate of reaction increase
Effect of decreasing size of solid reactant
Total surface area exposed to collisions increase
Frequency of collision between reactant particles increase
Frequency of effective collision between reactant particles increase
rate of reaction increase
Effect of rising temperature
Kinetic energy of reactant particle increases
Number of reactant particles that have enough energy to overcome activation energy increases
Frequency of effective collision between reactant particles increase
rate of reaction increase
Effect of Presence of Catalyst
Catalyst provide alternative pathway that lower the activation energy of a reaction
Number of reactant particles that have enough energy to overcome activation energy increases
Frequency of effective collision between reactant particles increase
rate of reaction increase
