Kinetics Flashcards
Reactions can only occur if…
Particles collide with enough energy and in the right orientation
What is activation energy
Minimum energy required to cause a chemical reaction
Describe the Maxwell-Boltzmann distribution
Energy on the x-axis, number of molecules on the y-axis, positive skew
Where is the mode and mean on the Maxwell-Boltzmann distribution
Mode is the highest point, mean is slightly to the right of the mode
What does the area underneath the graph represent
The total number of molecules
Define rate of reaction
Amount of products produced per unit time
Effect of temperature change on rate of reaction
Temperature increase causes an increase in rate of reaction
Change of Maxwell-Boltzmann distribution depending on temperature
An increase in temperature causes mode to decrease and move slightly to the right
Effect of concentration change on rate of reaction
Increase in concentration increases rate of reaction
Effect of pressure change on rate of reaction
Increase in pressure increases rate of reaction
What is a catalyst
A substance that increases the rate of reaction without being changed
How does a catalyst work
Provides an alternative reaction route of lower activation energy
Reasons for an increased rate of reaction
Collisions more likely, more frequent collisions, increases number of successful collisions, increases rate of reaction
On the Maxwell-Boltzmann distribution, why do some particles have little energy
Collisions cause some particles to lose energy
