Arrhenius equation
- Created by: horsewithnoname
- Created on: 28-01-17 15:09
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- Arrhenius Equation
- k=Ae^-Ea/RT
- k is the rate constant
- large k= fast reaction
- small k= slow reaction
- Ea is the activation enthalpy (J/mol)
- as Ea gets larger, k gets smaller
- this means the reaction will go slower
- If Ea is high, not many molecules have enough energy
- as Ea gets larger, k gets smaller
- T is the temperature (K)
- as temperature increases, k increases
- this means the reaction will go faster
- as temperature increases, k increases
- R is the gas constant (8.31 J K^-1 mol^-1)
- A is the pre- exponential factor
- constant that depends on the reaction taking place
- k is the rate constant
- The Arrhenius equation links the rate constant with Ea and temp
- changing the temp changes the rate of reaction
- doesn't affect concentration therefore affects k
- changing the temp changes the rate of reaction
- lnk= -(Ea/RT) + lnA
- this can be used to make a graph by plotting lnk against 1/T
- gradient= -Ea/R
- Ea and A can be worked out
- y intercept= lnA
- Ea and A can be worked out
- y intercept= lnA
- gradient= -Ea/R
- this can be used to make a graph by plotting lnk against 1/T
- k=Ae^-Ea/RT
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