Taking two measured values of the rate (at twodifferent temperatures) one can write:lnk 1 = lnA - (Ea/RT1)lnk 2 = lnA - (Ea/RT2)lnk 2 - lnk 1 = - (Ea/R)[(1/T2) - (1/T1)]ln(k 2/k 1) = - (Ea/R)[(1/T2) - (1/T1)]