Studied by 0 peopleChemistry Test Unit 6 - Chemical Kinetics
What must occur for particles to react?
correct alignment
sufficient speed
for the particles to collide
Which is a higher temperature: a higher or lower hill on a Maxwell-Boltzmann curve?
the lower hill
Which is a lower temperature: a higher or lower hill on a Maxwell-Boltzmann curve?
the higher hill
Why are the areas under each Maxwell-Boltzmann curve equal?
each curve contains the same amount of particles
What units is concentration measured in?
mol dm-3
What units is rate measured in?
mol dm^-3 s^-1
What part of the Arrhenius equation has to do with the number and orientation of the collisions?
A (frequency factor)
What does the y-intercept of an Arrhenius plot tell you?
frequency factor
What does the slope of an Arrhenius plot tell you?
activation energy
What part of the Arrhenius equation has to do with the fraction of reactant particles that have sufficient energy to react?
e^(-Ea/RT) (exponential factor)
What does the x-axis of an Arrhenius plot tell you?
1/Temperature
What does the y-axis of an Arrhenius plot tell you?
natural log of rate constant
Factors that affect the rate of reaction
concentration
temperature
surface area
catalysts
When to measure reaction progress using mass or volume
when a gas is evolved
When to measure reaction progress using absorbtion
when there is a color change
When to measure reaction progress using pH
when there is a change in acidity
When to measure reaction progress using conductivity
when there is a change in ionic concentration
Increasing the concentration of reactions ______ the collisions per second.
increases
Why does increasing temperature increase the rate?
More collisions
More particles will possess the necessary activation energy
Increasing surface area ______ the rate.
increases
Note
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