Reactions with large negative enthalpy changes are often encountered i
n the chemical industry. Sometimes they give rise to technical dangers
and hazards, including explosions. This investigation concentrates on
examination of adiabatic temperature-time-curves and gives non-linear
optimization procedures for obtaining kinetic parameters of simple de
compositions, e.g. o-nitrobenzaldehyde, two types of autocatalysis, co
nsecutive reactions and competitive consecutive reactions. The advanta
ge of this computing method is that only differential kinetic equation
s are needed.