The Arrhenius equation question

In summary, the Arrhenius equation is a mathematical formula developed by Swedish chemist Svante Arrhenius in the late 19th century. It relates the rate of a chemical reaction to its temperature and is written as k = Ae<sup>-Ea/RT</sup>. The equation is significant because it helps scientists understand the effect of temperature on reaction rates and can be used to predict the impact of temperature changes. It is commonly used in various fields of science and engineering, but has limitations as it only considers temperature and assumes first-order kinetics.
  • #1
jaydnul
558
15
When finding the activation energy, which equation is the correct one:

ln(k2/k1)=-Ea/R * (1/T2-1/T1)
or
ln(k1/k2)=Ea/R * (1/T2-1/T1)

Notice k1/k2 in the second equation. As well as the -Ea instead of Ea

Thanks
 
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  • #2
Aren't they both the same? ln(a/b) = ln a - ln b = -(ln b - ln a) = -ln(b/a) ?
 

1. What is the Arrhenius equation?

The Arrhenius equation is a mathematical formula that relates the rate of a chemical reaction to its temperature. It was developed by Swedish chemist Svante Arrhenius in the late 19th century and is used to determine the effect of temperature on reaction rates.

2. How is the Arrhenius equation written?

The Arrhenius equation is written as k = Ae-Ea/RT, where k is the rate constant, A is the pre-exponential factor, Ea is the activation energy, R is the gas constant, and T is the temperature in Kelvin.

3. What is the significance of the Arrhenius equation?

The Arrhenius equation is significant because it explains the relationship between temperature and reaction rates. It helps scientists understand the effect of temperature on the speed of a chemical reaction and can be used to predict how changes in temperature will impact a reaction.

4. How is the Arrhenius equation used in practice?

The Arrhenius equation is used in various fields of science and engineering, including chemistry, biology, and materials science. It is used to determine the optimal temperature for a reaction, predict the shelf life of products, and design industrial processes.

5. What are the limitations of the Arrhenius equation?

The Arrhenius equation assumes that the rate of a reaction is only affected by temperature and does not take into account other factors such as pressure or concentration. It also assumes that the reaction follows first-order kinetics and may not accurately predict reaction rates for complex or multi-step reactions.

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