Zero Order First Order Second Order Instant Rate Equation (Differential Rate Law) Rate = k[A]0 Rate = k[A]1 Rate = k[A]2 Time Based Rate Equation (Integrated Rate Law) [A]t = -kt + [A]i ln [A]t = -kt + ln [A]i = kt + 1 [A]t Slope of Line -k Half-Life t1/2 = [A]i -k t1/2 = 2k Arrhenius Equation 1 k .693 t1/2 = k ln (k) = - Ea + ln A RT [A]i 1 k[A]i Ln k2 = Ea • 1 k1 R T1 1 T2