Chapter 10 Flashcards
What is the rate of chemical reaction
Measures how fast a reactant is being used up or how fast a product is formed
Rate formula
Change in conc / time
Factors that affect rate of reaction
Conc
Pressure
Temp
SA
Catalyst
A collision is effective if which two conditions are met?
They collide with correct orientation
They had sufficient energy to overcome activation energy barrier of reaction
How does increasing conc affect rate of reaction?
Increases number of particles per unit of volume, they are close together and collide more frequently
The progress of a chemical reaction can be followed by…
Monitoring the removal (decrease in conc) of a reactant
Following formation (increase of conc) of a product
Features / what does a catalyst do?
Does not get used up in the reaction
Can react with reactant to form an intermediate
Catalyst is regenerated at end of reaction
Definition of catalyst
Increases rate of reaction by providing an alternative reaction pathway of lower activation energy
What is a homogenous catalyst
Has the same physical state as the reactants
What are heterogeneous catalyst
Different physical state from reactants
Reactant molecules are adsorbed onto surface of catalyst, where reaction takes place
After, product molecules leave the surface of catalyst by desorption
What is autocatalysts
When product acts as a catalyst
Draw the Boltzmann distribution curve with increase of temp - explain what happens to rate of reaction
T2 should have a lower peak, greater proportion of particles with same or equal amount of activation energy
Draw the Boltzmann distribution curve with catalyst - explain what happens to rate of reaction
Ec drawn to the left from Ea - greater proportion of molecules exceeds the new lower activation energy
Why are equilibrium systems dynamic?
Both forward and reverse reactions are taking place
What is the position of equilibrium?
Shows extent of reaction depending on external factors such as pressure/temp
