Arrhenius Equation Flashcards
1
Q
What did Arrhenius find
A
That he obtained a straight line if he plotted the natural logarithm of the rate constant for a reaction against 1/T (the inverse of the absolute temperature)
2
Q
What is the Arrhenius equation and what does it show
A
Describes the relationship between rate constant and temperature
k= A e ^-Ea/RT
3
Q
What do the letters stand for in the Arrhenius equation
A
k= rate constant
e= mathematical quantity
R= gas constant (8.31JK-1mol-1)
T= absolute temperature (on Kelvin scale)
Ea=activation energy
A= constant
4
Q
How to calculate activation energy from graph showing ln k against 1/T
A
Find the gradient and multiply by negative R
5
Q
How does the value of rate constant change as temperature rises
A
Generally also increases
