Rate Equations & Arrhenius Flashcards
How do you find the individual order of something eg A
Look where A changes and the other things stay the same. Then compare A with rate
What’s the units for rate
Moldm^-3 s^-1
What’s the units for [A] eg
Moldm^-3
How do you know what species is the catalyst
it will be in the rate equation but not the overall equation
What is 0 order
No effect on ROR
What is 1st order
The same as ROR
What is 2nd order
The ROR is the [conc] squared ^2
How does temperature effect the rate constant (K)
As temperature increases the rate constant increases
Define the rate constant (k)
a number that connects the concentration of reactants in a reaction to the rate of that reaction
Define order of reaction
the power to which the concentration of that reactant is raised in the rate equation
How do you work out activation energy (Ea) in the Arrhenius equation
- RT(In A - In K)
- Then divide by 1000
How do you work out T in the Arrhenius equation
Activation energy/ R(In A - In k)
In the Arrhenius equation what units must activation energy be in
Joules. So if in kJ then multiply by 1000 to get in J
What will the units of A (Arrhenius constant) be the same as
The units of the rate constant
How do you work out the Arrhenius constant
K divided by e to the power of (-Ea/RT)
