Reaction Rates

Question 1

Collision theory

Answer 1

Molocules must collide with sufficient energy and with the correct orientation for a reaction to occur

Question 2

Activation energy

Answer 2

minimum amount of Ek
r4f that particles must have to react when they collide

Question 3

Heterogenous catalyst

Answer 3

A catalyst that is in a different physical state/phase as reactants

Question 4

Catalyst

Answer 4

A substance that increases rate of reaction by providing an alternate reaction pathway with a lower EA. Catalyst is chemically unchanged at end of reaction

Question 5

Le Chatelier’s principle

Answer 5

If a closed system is in equilibrium , and a change is made to any of the conditions, then the system responds to counteract that change

Question 6

Dynamic Equillibrum

Answer 6

Rate of foreward reaction is the same as the rate of backwards reaction so [products] and [reactants] stays constant

Question 7

How do heterogenous catalysts work

Answer 7

Reactants adsorbed onto surface of catalyst
Reactants react on surface of catalysts in a reaction that requires less Ea than if reactants weren’t on surface of catalyst
Reactants are desorbed from surface of catalyst