# How do you solve the Arrhenius equation?

##### 1 Answer

Apr 7, 2016

The Arrhenius equation is:

#\mathbf(k = Ae^(-E_a"/"RT))# where:

#k# is therate constant, in units that depend on the rate law. For instance, if#r(t) = k[A]^2# , then#k# has units of#"M"/"s" * 1/"M"^2 = 1/("M"cdot"s")# .#A# is the"pre-exponential factor", which is merely an experimentally-determined constant correlating with the frequency of properly oriented collisions.#E_a# is theactivation energyin units of, say,#"J"# .#R# is theuniversal gas constant. Using#"J"# ,#R = "8.314472 J/mol"cdot"K"# .#T# istemperaturein#"K"# .

People can determine the temperature themselves when they experimentally figure out the rate constant, so you can assume that you know

I go into how to calculate those here.