Activation energy of a chemical reaction can be determined by

Options

A. evaluating rate constant at standard temperature
B. evaluating velocities of reaction at two different temperatures
C. evaluating rate constants at two different temperatures
D. changing concentration of reactants

Answer

C

Explanation

Activation energy can be calculated by using arrhenius equation the Arrhenius equation is
`Log""(K_(2))/(K_(1))=(E_(a))/(2.303R)[(T_(2)-T_(1))/(T_(1)T_(2))]`
where `K_(1) and k_(2)` =rate constants at two different temperature i.e., `T_(1) and T_(2)` respectively .
`E_(a)`= Activation energy
R= Gas constant
So, Activation energy of a chemical reaction can be detetmined by evevaluating rate constants at two different temperatures.