The rate of a reaction depends upon the temperature and is quantitatively expressed ask = A ei) If a graph is plotted between log k and 1/T, write the expression for the slope of the reaction?ii) I...

Question

The rate of a reaction depends upon the temperature and is quantitatively expressed as
k = A e

i) If a graph is plotted between log k and 1/T, write the expression for the slope of the reaction?

ii) If at under different conditions E_a1 and E_a2 are the activation energy of two reactions. If E_a1 = 40 J / mol and E_a2 = 80 J / mol. Which of the two has a larger value of the rate constant?

Philoid · Accepted Answer

Given, rate of a reaction depends upon the temperature and is expressed as

k = A e

Taking logarithm on both sides, we get

The equation is like . If the graph is plotted between y () and x (), the slope (m) can be calculated.

(i) So, slope is =

(ii) As the value of activation energy, E_A increases, the value of rate constant, k decreases.

So if, E_A1 (40 J / mol ) < E_A2 (80 J / mol) then

k₁>k₂ respectively.