Question

For Arrhenius equation, the intercept of the plot lnk vs $\frac{1}{T}$ is:

• A. $-\frac{E_a}{R}$
• B. $\ln A$
• C. $A$
• D. $\frac{1}{\ln A}$

Answer 1

The correct option is B $\ln A$

$k=A{e}^{-E_a/RT}$
$\ln k=\ln A-\frac{E_a}{RT}$
It is similar to the equation of a straight line.
$y=mx+C$
$m=\text{slope, C=intercept}$
$m=-\frac{E_a}{R}$
$C=\ln A$