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Arrhenius Equation

Write Arrheni...

Question

Write Arrhenius equation.What is $E_{a}$ in the equation called?

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Solution

The Arrhenius equation is $k = A e^{- E_{a} / R T}$ .
Here, $E_{a}$ is the activation energy.

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The rates of chemical reactions are strongly affected by temperature. Arrhenius (1889) gave following relation between rate constant and temperature:

k = A e^{- E_{a} / R T}

This equation is called Arrhenius equation. The constant '

A

' is called Arrhenius constant or pre-exponential factor.

The logarithm of Arrhenius equation is:

{log}_{10} k = {log}_{10} A - \frac{E_{a}}{2.303 R T}

This equation for a reaction is:

{log}_{10} k = 14 - \frac{1.25 \times 10^{4} K}{T}

Energy of activation in

k

c a l

{m o l}^{- 1}

Q. In Arrhenius equation,

k = A e^{- E_{a} / R T}

e^{- E_{a} / R T}

Q. In Arrhenius equation

K = A e^{- E_{a} / R T}

e^{- E_{a} / R T}

is referred as:

Q. Rate of reaction can be expressed by Arrhenius equation as

k = A e^{- E a / R T}

. In this equation

E_{a}

Q. Rate of a reaction can be expressed by Arrhenius equation as,

k = A e^{- E_{a} / R T}

. In this equation,

E_{a}

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