On the quasi steady-state approximation in non-isothermal kinetics

Using he example of the sequence of two first order reactions: [GRAPHICS] the paper investigates the validity of the quasi steady-stage approximation (QSSA) under non-isothermal conditions. It is shown that the value of the heating rate plays an important role in the validity of this approximation and a limit value for it has been found. It is demonstrated that below this limit the steady-stage approximation is also valid for non-isothermal cond itions but the validity is questionable for experiments that use higher val ues of the heating rate.