For a variety of reasons, usually having to do with
temperature control or other reaction variables, it is
common practice to plot lnk vs. 1/T. The slope of this
plot is –Ea/R where Ea is the Arrhenius activation energy.
This quantity approximates ΔH≠ (the difference is
given by RT for a simple first order process; at room
temperature this represents approximately 600 cal mol
– formany experiments the limits of temperature control